I came across a tweet from Michael Rockwell yesterday that made me jump for joy:

I'm always on the lookout for super-subtle home screen wallpapers that won't clash with my app icons. I've almost exclusively used a plain black rectangle on my iOS devices for years, but sometimes you want to breathe a little life into a screen you're constantly watching. When I saw Michael's tweet, I was hit with a blast of both excitement and nostalgia! I get to add a little texture on my home screen and I get a tiny reminder of the skeuomorphism that once was? Sold!

Rockwell's post talks about app organization, iOS 11, his inspiration for creating the linen wallpapers, and a whole lot more.

Go give it a read and then snag that linen wallpaper for yourself! Rockwell's got 'em for all sizes of iPhone, iPad, and Mac!

Apple has released iOS 4.3.5 for iPad, iPod touch, and GSM /AT&T iPhone 4 and iPhone 3GS, and iOS 4.2.10 for Verizon iPhone, which fixes a security vulnerability with certificate validation.

This latest release arrives just 10 days after Apple plugged the jailbreakme PDF exploit with the release of iOS 4.3.4.

Plug into iTunes and check for updates to get it. As always, if you’re Jailbroken already, stay away or you’ll lose your Jailbreak.

[Apple knowledge base article]

iOS 4.3 is now in gold master and scheduled for release on March 11, 2011 alongside iPad 2 with new features like Wi-Fi personal hotspot for iPhone, iTunes home sharing, improved AirPlay, faster Safari and more.

If you want a quick look at the new software but don't have a lot of time, check out the video above for everything you need to know about iOS 4.3 in just 5 minutes. For a more in-depth iOS 4.3 guide, read on after the break.

Note: We're combining iPhone, iPod touch, and iPad walkthroughs below since, post iOS 4.2 grand-unification the size of the updates are roughly similar. If it gets more complicated later, we'll split iPhone/iPod touch out from iPad like last time.

What hasn't changed

iOS 4.3 looks to have interesting albeit far from numerous changes thus far. Since we're only covering what's new and improved, here's a list of previous walkthroughs for those new to iPhone, iPod touch, and iPad so you can learn about all the established features. Major releases in bold.

• iOS 4.2 for iPhone | iOS 4.2 for iPad
• iOS 4.1 for iPhone
• iOS 4 for iPhone
• iOS 3.2 for iPad
• iOS 3.1 for iPhone
• iOS 3.0 for iPhone
• iPhone 2.2 for iPhone
• iPhone 2.1 for iPhone
• iPhone 2.0 for iPhone

System-wide changes

AirPlay was introduced in iOS 4.2 and allows video and audio to be sent from iPhone, iPod touch, iPad, and iTunes on Windows or Mac to an Apple TV, or audio-only to a growing number of 3rd party speakers and other accessories. While iOS 4.2 only provided video-to-Apple TV support from the YouTube and iPod/Video apps, iOS 4.3 gives both App Store apps and web content the ability to send video to Apple TV. (Note: Apps like Hulu may well block this functionality due to Hollywood being catastrophically short sighted when it comes to the digital age.)

With iPad 2 and either the old VGA adapter or new HDMI adapter, you'll be able to mirror your device display on an external monitor.

Video mirroring, as the name suggests, means everything and anything you see on iPad 2, from Home Screen to apps, will be shown exactly the same on your external monitor or HD TV. (Hulu and similar apps might have a way to block this, we'll have to test it and see.)

Previous devices like iPad and iPhone 4 will only be able to output video the way they currently do, if the particular app enables it. (like iPod, Video, Keynote, YouTube, Safari, Photos, and App Store apps that support it.)

Home Screen

SpringBoard, the app that runs the home screen and overall interface in iOS, gets its multitasking dock UI tweaked once again on iPad.

Apple has introduced 4 or 5 finger multitouch navigation gestures in the iOS 4.3 for iPad but only for developers to test. They won't be available to regular users. To get them to appear in Settings, you need to connect your iPad to Xcode and enable the device for development. (See our how to enable iPad multitasking gestures in iOS 4.3 article for more.)

The new gestures don't replace the Home Button but do reduce the amount of times you need to single or double click it, which could reduce concerns of hardware wear and tear post iOS 4 multitasking.

The new gestures can be done with 4 or 5 fingers and resemble multitouch trackpad gestures available on Mac OS X since the introduction of the original MacBook Air in 2008 and expanded upon in the recent Mac OS X 10.7 Lion preview given by Steve Jobs at the Back to the Mac event. The gestures currently include

• Pinch all fingers in to exit an app and return to the Home Screen (identical to single-clicking the Home Button).
• Swipe up from the bottom bezel to reveal the multitasking Fast App Switcher Dock (identical to double-clicking the Home Button).
• Swipe sideways from left to right or right to left to move between recently open apps (similar to double-clicking the Home Button to reveal the Fast App Switcher and tapping on an app icon immediately to right).

The sideways swipe is interesting in that it allows you to go left or right whereas the Fast App Switcher reorders the recent app icons so you always go backwards in "time" to the right. It seems perceptively faster for a single app-back movement since there's no carousel animation, yet you can only swipe back one app at a time whereas you can tap on any of 4 immediately available app icons in the Fast App Switcher and swipe back 4 additional apps at a time.

Performance on the current generation iPad, however, is hampered by lack of RAM. With only 256MB many apps will need to reload when you swipe back to them (at least so far in the beta). If iPad 2 has at least 512MB -- or better yet 1GB -- it would fly with this system.

When iPad shipped with iOS 3.2 the hardware switch above the volume rocker was set to lock or unlock screen orientation. In iOS 4.2 it was changed to a mute/un-mute switch like iPhone. Uncharacteristically, Apple has now added a Settings toggle to let the user choose which function they want the switch to perform. Since iOS 4.2 added a software orientation lock widget in the multitasking Fast App Switcher dock, iOS 4.3 now also toggles between that widget and a software mute button to fill whichever function is no longer being provided by the hardware switch. (Hardware switch set to orientation lock means dock widget becomes mute button and vice-versa.)

Photos

As mentioned above, you now have the ability to send recorded videos out over AirPlay to Apple TV, something which was noticeably missing when the feature was introduced in iOS 4.2.

Notes

iOS 4.2 finally let us change the Notes font from Marker Felt to something -- anything -- else, as long as that anything else was Helvetica or Chalkboard. Well it turns out Chalkboard wasn't long for this world as it has been replaced in iOS 4.3 with Noteworthy.

App Store

The App Store gets a new design for the Updates page.

Although it's not an iOS 4.3 specific feature, App Store has also been updated recently on the server side with a few new features. On all devices, if you've already bought or downloaded an app but it's not currently loaded on your iPhone, iPod touch, or iPad, instead of the Free or price button, you get an Install button. (This doesn't seem true in all regional App Store yet, but is working in the US App Store.)

Also not iOS 4.3 specific but since the timing fits, on the iPad there are also new filters in place on the search page, including Category, Release Date, Customer Rating, Price, and Device, as well as a Reset Filters option. Since App Store, like iTunes is really just an app-wrapped, internet powered, WebKit UI Apple can make all sorts of changes without having to wait for a new iOS version to ship. Usually these are just content features, banners, etc. (or the addition of Ping...) but it's nice to see new functionality sneak in every once and a while.

Also, if you leave a search to go to Featured or Top Charts, etc. and then tap the search field at the top right, you're whisked right back the previous search results, sans keyboard.

In-app purchases now always require a password. Previously iOS would remember a password for a short amount of time after it was last entered. This led to children purchasing huge quantities of Smurfberries and other "freemium" content, which in turn led to the new password challenge system. (Of course this does nothing to protect parents wh

For developers, iAds can now go full screen. That includes the big iPad screen, which Apple says allow for "immersive, interactive iAd experience". They also say the new banner format is easy to implement.

HTTP Live Streaming, the technology Apple uses to stream high quality video including their own press conferences and events, now includes viewer engagement and performance metrics. This is intended to help developers fine tune and optimize their content.

iTunes

iOS 4.3 brings a new set of push notifications to the table -- for Apple's Ping social musical network. So if you've been dying to know what Phil Schiller -- or Chad -- has bought, liked, or commented on in iTunes as instantaneously as possible you'll get your wish.

FaceTime (iPad 2)

iPhone 4 got FaceTime with iOS 4 and iPod touch 4 with iOS 4.1, and now it's iPad 2's turn with iOS 4.3. Just like iPod touch 4, there's a dedicated -- and newly redesigned -- FaceTime icon so you can easily launch it (iPhone still launches from the Phone app). Since, also like iPod touch 4, there's no phone number associated with an iPad 2, it uses Apple/iTunes IDs to map the connections.

Enter your credentials and you'll be able to FaceTime with anyone on iPhone 4, iPod touch 4, iPad 2, or Mac.

[We'll update this when iPad 2 ships and we have a chance to test it.]

Photo Booth (iPad 2 only)

Photo Booth, like the Mac app of the same name, is a fun time-killer where you can apply effects to the live camera view and save the pictures for use in profiles or just to share with friends and family. Thanks to the new cameras in iPad 2 and the powerful A5 processor you can see 9 live video streams, with effects applied, in real time. Since iOS is multitouch enabled, you can also use gestures to manipulate the effects in real time.

[We'll update this when iPad 2 ships and we have a chance to test it.]

Settings

Not only does Settings hide the usually interesting tweaks found in any new iOS version but this time it's home to one of the marquee new features -- Wi-Fi Personal Hotspot.

Freshly sandwiched in between VPN and Notifications for iPhone users is the new top-level Personal Hotspot setting. (It also find it in Settings: General: Network: Personal Hotspot, where it replaces the previous Tethering setting, but why dig that deep when you no longer have to?)

When you tap Personal Hotspot you're taken to a screen that lets you toggle it on or off (why can't we do this top-level like Airplane Mode or VPN?) along with your -- visible -- current WPA access point password (with no choice to hide it). Instructions on how "to connect using Wi-Fi" have been added to the previous tethering instructions for Bluetooth and USB. As before with Bluetooth, if you don't have Wi-Fi enabled you'll get a popup asking if you'd like to enable it or if you'd prefer to tether via Bluetooth (if that's enabled) or USB.

You can change your WPA password by tapping on it, and you're warned the new password must be at least 8 characters long (we recommend something not easily guessed like "password") and that changing the password will disconnect any currently connected devices.

When activated you get the same blue bar across the top of your iPhone that tethering presented under iOS 3 and iOS 4, though renamed Personal Hotspot and now indicating the number of devices connected (up to a maximum of 5 on Verizon, 3 on most GSM carriers like AT&T).

For iPhone 3GS users personal hotspot is there and in the same top-level position, but is limited to the old-style Bluetooth and USB.

Location Services has also been promoted to top level in iPhone, iPod touch, and iPad. (see iPhone screenshot above, iPad screen shot below)

Mercifully, the new Text Tones for iPhone 4 introduced in iOS 4.2 have been made shorter as better fits Text Tones. Tragically, they haven't been made any better. It's bewildering.

Vibration has also changed for text/SMS alerts. Now you get two short vibrations for an SMS on both iPhone 4 and iPhone 3GS.

If you don't want your children discovering new, electronic hipster songs on Apple's social music network, Ping, iOS 4.3 lets you disable it via the Parental Controls.

The iPad's hardware switch, originally released as an orientation lock/unlock in iOS 3.2 and changed to an iPhone-like mute/un-mute switch in iOS 4.2 now becomes user assignable in iOS 4.3. Yes, with a simple checkbox you can choose which way you personally like it.

As mentioned up top, whichever option you do not choose becomes a software control in the multitasking Fast App Switcher dock.

A simple toggle allows you to turn on or off the new multitasking navigation gestures (see the description under system-wide changes, above). These are intended for developers only, not end-users so you need to connect to Xcode to enable them. (See our how to enable iPad multitasking gestures in iOS 4.3 article for more.)

The settings for Messages now allow you to choose how many times you want SMS/MMS alerts to sound, repeated at two minute intervals. Choices include:

• Once
• Twice
• 3 Times
• 5 Times
• 10 Times.

New to iPod Settings, you can scroll down and enter your iTunes username and password to enable Home Sharing (if you enter the wrong information, you'll get a popup telling you it can't be enabled).

As mentioned previously, Noteworthy replaces Chalkboard in the Notes settings.

Phone + Contacts

A minor but likely very welcome change in iOS 4.3 beta sees the addition of a wait button to the add contact phone number's extended keyboard and the rejiggering of some of the other buttons like pause.

This can also be used to setup single-tap conference call dialing, with the pause to send passcodes.

Safari

Hopefully Apple's comments about AirPlay supporting web content means we'll be able to stream H.264 video from Safari to Apple TV as well under iOS 4.3.

In addition we'd expect Apple adds whatever other HTML 5, CSS, and Nitro (their JavaScript rendering engine) improvements they've made since iOS 4.2 shipped.

iPod

iPod gains Home Sharing under iOS 4.3, the ability to stream media from your Mac or Windows PC the same way Apple TV (2010) has been doing since last fall.

Once you enable Home Sharing in Settings (see above) you can tap on More on the bottom tabs, select the new Shared icon at the bottom, and tap on the computer name you want to access under Shared Libraries

You'll be taken "back" to the iPod app media list but you'll now be seeing your PC's library instead of your local device library (it can be a little confusing at first but the PC library name is written on top of the scroll list). Choose your music, TV, movies, or other media just as you would have previously, but it'll now stream from your PC over Wi-Fi.

To change back to your local device library, tap on More, tap on Sharing, and select your local device from the top of the list (you'll see a checkmark next to whichever library is currently the active one).

So it's a little complex and it can be confusing, but it works and for media you only want access to occasionally, it can save you a lot of occasional syncing

Apple says you can also post and like songs on Ping directly from the Now Playing screen but I haven't seen the controls for it yet.

Apple TV

Apple TV is also getting the iOS 4.3 treatment. Major new features include:

• AirPlay for App Store apps and compatible web video
• Dolby Digital 5.1 for Netflix
• New slideshow themes
• An improved keyboard
• MLB HD streaming for MLB.com subscribers
• NBA HD streaming for NBA league pass subscribers

MLB and NBA are built-in, just like Netflix.

Pricing and compatibility

iOS 4.3 is available free of charge to all compatible iOS devices. Compatibility, however, is so far even more restricted that iOS 4 -- namely iPhone 3G/iPod touch G2 do not have beta versions of iOS 4.3 to date.

• iPhone 4 (GSM), iPod touch 4 (2010): All features except display mirroring
• iPhone 4 (Verizon): No update announced.
• iPhone 3GS and iPod touch G3 (2009), iPad 1 (2010): No features requiring iPhone 4, iPod touch 4, or iPad2-type hardware (i.e. front facing camera)
• iPhone 3G and iPod touch G2 (2008): not compatible
• iPhone 2G and iPod touch G1 (2007): not compatible

Conclusion

iOS 4.3 gives AirPlay some much-needed improvements, adds Home Sharing, begins to fix the horrible text-tones for iPhone, and provides the fantastic personal hotspot feature for iPhone 4. It's not a huge update but it's a good one.

If you were expecting more major updates, like notification SIRI-infused, OS-wide VoiceControl system, etc. etc. then you'll need to wait for a more major update like iOS 5. (Which should be previewed this month or next.) For now you have a few more toys to play with in your iOS chest.

As always, If you noticed we missed anything, drop us a note in the comments or send us an email and we'll update as needed.

Greenpois0n RC5 now allows you to jailbreak iOS 4.2.1 untethered on most devices including iPhone 4 and iPad. The best part? You won't need any SHSH blobs saved. redsn0w beta required you to have 4.2b3 blobs saved (and it was pretty unstable). Hopefully greenpois0n is going to be a much smoother experience for you guys. Hit the jump for a walkthrough on how to jailbreak iOS 4.2.1 with greenpois0n and for the answers to some commonly asked questions.

• iPhone 4/3GS
• iPad
• iPod Touch 2G/3G/4G
• AppleTV second generation

You'll need to be running iOS 4.2.1 in order for this version of greenpois0n to work (4.1.1 for AppleTV second generation users).

In short, most likely. If you're already stock and haven't been jailbroken, you're fine. Still back up your phone first in case anything goes wrong.

If you are currently jailbroken on 4.1, yes. Do a full stock restore to 4.2.1 and restore as a new iPhone. After jailbreaking, I still don't recommend restoring from a backup. Old jailbreak pieces can come with your backup and cause issues for you. Just my personal recommendation.

If you are currently tethered on 4.2.1 via redsn0w, you should be able to just run greepois0n right over your current jailbreak to untether. Some of the devs are saying if you have issues installing Cydia via greenpois0n after running it, simply run redsn0w again and let it re-install Cydia. Basically, as long as you aren't running a Monte version jailbreak on 4.2.1, you should be able to run greenpois0n to untether.

No. You'll have to wait a bit longer on a tested jailbreak for 4.3.

Jailbreaking iOS 4.2.1 via Greenpois0n

1. Download greenpois0n onto your Mac. (Some users have been reporting the servers being down. If you can't get it to download right away, just be patient. Their servers are probably just lagging from all the traffic. There are a few mirrors out there so be sure to check the comments for the latest updates on those.
2. Plug your iPhone, iPod Touch, iPad, or AppleTV in via USB (make sure the power is off) and follow the on-screen instructions to enter DFU mode.

3. Greenpois0n will recognize when your phone is properly in DFU mode and start to do its thing. After it's done, you'll see a Loader icon on your homescreen. Tap it and install Cydia. (Note: This only differs for AppleTV jailbreakers. You'll be done but need to continue accessing and installing apps via Terminal and SSH.)

4. You're done! Restore all your stuff (if you choose to or were stock before) and enjoy being jailbroken!

Note: Some users in the comments have been reporting sometimes the initializing error is a result of not holding the home button long enough when entering DFU mode. Even when the text is not greyed out anymore, continue holding the home button if you're getting the Initializing error even after trying Greenpois0n RC5 version 2.

If you guys have already used this version of greenpois0n, let us know how it's going in the comments! Have other questions? Check our our Jailbreak Starters Guide and jailbreak forums!

iOS 4.3 has just come out in beta with a rumored release date anywhere from February 10 (the Verizon iPhone release date) to March, 2011, and new features like Wi-Fi personal hotspot for iPhone and multitouch navigation gestures for iPad.

If you want a quick look at the new software but don't have a lot of time, check out the video above for everything you need to know about iOS 4.3 in just 5 minutes. For a more in-depth iOS 4.3 guide, read on after the break.

Note: We're combining iPhone, iPod touch, and iPad walkthroughs below since, post iOS 4.2 grand-unification the size of the updates are roughly similar. If it gets more complicated later, we'll split iPhone/iPod touch out from iPad like last time.

What hasn't changed

iOS 4.3 looks to have interesting albeit far from numerous changes thus far. Since we're only covering what's new and improved, here's a list of previous walkthroughs for those new to iPhone, iPod touch, and iPad so you can learn about all the established features. Major releases in bold.

• iOS 4.2 for iPhone | iOS 4.2 for iPad
• iOS 4.1 for iPhone
• iOS 4 for iPhone
• iOS 3.2 for iPad
• iOS 3.1 for iPhone
• iOS 3.0 for iPhone
• iPhone 2.2 for iPhone
• iPhone 2.1 for iPhone
• iPhone 2.0 for iPhone

System-wide changes

AirPlay was introduced in iOS 4.2 and allows video and audio to be sent from iPhone, iPod touch, iPad, and iTunes on Windows or Mac to an Apple TV, or audio-only to a growing number of 3rd party speakers and other accessories. While iOS 4.2 only provided video-to-Apple TV support from the YouTube and iPod/Video apps, iOS 4.3 promises to allow both apps and web content the ability to send video to Apple TV. (It's up to individual developers to implement, of course.)

Apple's own apps, like Photo, should be able to AirPlay video recordings in iOS 4.3 as well. Hurray.

3rd party apps like Air Video and Zumocast should gain Airplay Video streaming. No word yet on Angry Birds (using iPhone or iPad as a controller, naturally).

Home Screen

SpringBoard, the app that runs the home screen and overall interface in iOS, gets its multitasking dock UI tweaked once again on iPad.

Apple has introduced 4 or 5 finger multitouch navigation gestures in the iOS 4.3 for iPad beta with language that indicates they may or may not be bound for primetime:

The new gestures don't replace the Home Button but do reduce the amount of times you need to single or double click it, which could reduce concerns of hardware wear and tear post iOS 4.

The new gestures can be done with 4 or 5 fingers and resemble multitouch trackpad gestures available on Mac OS X since the introduction of the original MacBook Air in 2008 and expanded upon in the recent Mac OS X 10.7 Lion preview given by Steve Jobs at the Back to the Mac event. The gestures currently include

• Pinch all fingers in to exit an app and return to the Home Screen (identical to single-clicking the Home Button).
• Swipe up from the bottom bezel to reveal the multitasking Fast App Switcher Dock (identical to double-clicking the Home Button).
• Swipe sideways from left to right or right to left to move between recently open apps (similar to double-clicking the Home Button to reveal the Fast App Switcher and tapping on an app icon immediately to right).

The sideways swipe is interesting in that it allows you to go left or right whereas the Fast App Switcher reorders the recent app icons so you always go backwards in "time" to the right. It seems perceptively faster for a single app-back movement since there's no carousel animation, yet you can only swipe back one app at a time whereas you can tap on any of 4 immediately available app icons in the Fast App Switcher and swipe back 4 additional apps at a time.

Performance on the current generation iPad, however, is hampered by lack of RAM. With only 256MB many apps will need to reload when you swipe back to them (at least so far in the beta). An iPad 2 with 512MB -- or better yet 1GB -- would fly with this system (just sayin'...).

When iPad shipped with iOS 3.2 the hardware switch above the volume rocker was set to lock or unlock screen orientation. In iOS 4.2 it was changed to a mute/un-mute switch like iPhone. Uncharacteristically, Apple has now added a Settings toggle to let the user choose which function they want the switch to perform. Since iOS 4.2 added a software orientation lock widget in the multitasking Fast App Switcher dock, iOS 4.3 now also toggles between that widget and a software mute button to fill whichever function is no longer being provided by the hardware switch. (Hardware switch set to orientation lock means dock widget becomes mute button and vice-versa.)

Photos

As mentioned above, you now have the ability to send recorded videos out over AirPlay to Apple TV, something which was noticeably missing when the feature was introduced in iOS 4.2.

Notes

iOS 4.2 finally let us change the Notes font from Marker Felt to something -- anything -- else, as long as that anything else was Helvetica or Chalkboard. Well it turns out Chalkboard wasn't long for this world as it has been replaced in iOS 4.3 with Noteworthy.

App Store

The App Store gets a new design for the Updates page.

For developers, iAds can now go full screen. That includes the big iPad screen, which Apple says allow for "immersive, interactive iAd experience". They also say the new banner format is easy to implement.

HTTP Live Streaming, the technology Apple uses to stream high quality video including their own press conferences and events, now includes viewer engagement and performance metrics. This is intended to help developers fine tune and optimize their content.

iTunes

iOS 4.2 beta 2 brings a new set of push notifications to the table -- for Apple's Ping social musical network. So if you've been dying to know what Phil Schiller -- or Chad -- has bought, liked, or commented on in iTunes as instantaneously as possible you'll get your wish just as soon as iOS 4.3 ships.

Settings

Not only does Settings hide the usually interesting tweaks found in any new iOS version but this time it's home to one of the marquee new features -- Wi-Fi Personal Hotspot.

Freshly sandwiched in between VPN and Notifications for iPhone 4 users is the new top-level Personal Hotspot setting. (It also find it in Settings: General: Network: Personal Hotspot, where it replaces the previous Tethering setting, but why dig that deep when you no longer have to?)

When you tap Personal Hotspot you're taken to a screen that lets you toggle it on or off (why can't we do this top-level like Airplane Mode or VPN?) along with your -- visible -- current WPA access point password (with no choice to hide it). Instructions on how "to connect using Wi-Fi" have been added to the previous tethering instructions for Bluetooth and USB. As before with Bluetooth, if you don't have Wi-Fi enabled you'll get a popup asking if you'd like to enable it or if you'd prefer to tether via Bluetooth (if that's enabled) or USB.

You can change your WPA password by tapping on it, and you're warned the new password must be at least 8 characters long (we recommend something not easily guessed like "password") and that changing the password will disconnect any currently connected devices.

When activated you get the same blue bar across the top of your iPhone that tethering presented under iOS 3 and iOS 4, though renamed Personal Hotspot and now indicating the number of devices connected (up to a maximum of 5).

Note: Personal Hotspot currently does not seem to be available for iPhone 3GS users, much as individual text tones weren't under iOS 4.2.

Location Services has also been promoted to top level in iPhone, iPod touch, and iPad. (see iPhone screenshot above, iPad screen shot below)

If you don't want your children discovering new, electronic hipster songs on Apple's social music network, Ping, iOS 4.3 lets you disable it via the Parental Controls.

The iPad's hardware switch, originally released as an orientation lock/unlock in iOS 3.2 and changed to an iPhone-like mute/un-mute switch in iOS 4.2 now becomes user assignable in iOS 4.3. Yes, with a simple checkbox you can choose which way you personally like it.

As mentioned up top, whichever option you do not choose becomes a software control in the multitasking Fast App Switcher dock.

A simple toggle allows you to turn on or off the new multitasking navigation gestures (see the description under system-wide changes, above).

(If you don't see the setting try connecting your iPad to Xcode and hitting the "use this device for development" button.)

The settings for Messages now allow you to choose how many times you want SMS/MMS alerts to sound, repeated at two minute intervals. Choices include:

• Once
• Twice
• 3 Times
• 5 Times
• 10 Times.

As mentioned previously, Noteworthy replaces Chalkboard in the Notes settings.

Phone + Contacts

A minor but likely very welcome change in iOS 4.3 beta sees the addition of a wait button to the add contact phone number's extended keyboard and the rejiggering of some of the other buttons like pause.

Safari

Hopefully Apple's comments about AirPlay supporting web content means we'll be able to stream H.264 video from Safari to Apple TV as well under iOS 4.3.

In addition we'd expect Apple adds whatever other HTML 5, CSS, and Nitro (their JavaScript rendering engine) improvements they've made since iOS 4.2 shipped.

Hints at more

As is often the case, iOS 4.3 beta 1 contains strings and refrences that hint at even more features, including those for future devices.

• Find My Friends feature hidden in iOS 4.3?
• iOS 4.3 beta points to iPad 2 cameras but no Retina Display
• iPhone 5, iPad 2 model numbers found lurking in iOS 4.3

Pricing and compatibility

No iOS 4.3 pricing information has been made available but we'll go out on a limb and say it'll likely be free for everyone and all devices, same as iOS 4.2.

Compatibility, however, is so far even more restricted that iOS 4 -- namely iPhone 3G/iPod touch G2 do not have beta versions of iOS 4.3 to date.

• iPhone 4, iPod touch 4 (2010), iPad: All features
• iPhone 3GS and iPod touch G3 (2009): No features requiring iPhone 4 or iPod touch 4-type hardware (i.e. front facing camera)
• iPhone 3G and iPod touch G2 (2008): not compatible/no update (yet?)
• iPhone 2G and iPod touch G1 (2007): not compatible/no update

We'll update as soon as we find an official list from Apple.

Not concluded

It's possible Apple will supply additional new features in a future iOS 4.3 beta or even take some existing beta features away. As always, If you noticed we missed anything, drop us a note in the comments or send us an email and we'll update as needed.

So Apple has released iOS 4.2 for iPhone, iPod touch, iPad and Apple TV and that means old problems and bugs get fixed and new problems and bugs emerge. Hey there's no such thing as perfect code.

We here at TiPb are going to be doing our best to track any iOS 4.2 bugs we come across and offer whatever solutions and workaround we find so if you've installed the latest software from Apple and come across anything we should know about drop it in a comment below or head on over to our forums and start troubleshooting with us!

Note:

• You need an AirPlay compatible device like AppleTV or Airport Extreme to get the AirPlay icon to show up
• The new SMS Text Tones are only on iPhone 4. If you have iPhone 3GS or earlier, no text tones for you.

As previously announced, iOS 4.2 for iPhone, iPod touch, iPad, and Apple TV is now available for download via iTunes (or directly on Apple TV). Expect the servers to be crushed, but let us know when you get it, when you've got it, and how it's working for you.

And while you're waiting for the download to finish, here once again are our handy references:

• Updating to iOS 4.2? Here's what to do first!
• Everything you need to know about iOS 4.2 in 10 minutes
• Complete iOS 4.2 for iPhone and iPod touch walkthrough
• Complete iOS 4.2 for iPad walkthrough
• iPhone Help Forum
• iPad Help Forum

Timed to coincide with the release of iTunes 10.1 and iOS 4.2, Ping has come to the iPad... Of course, if you're still running iOS 3.2.x on your iPad, you'll get it as well. (iTunes Store app is basically a thin client for all the web data stored on the cloud so it's easy for Apple to update it on the backend -- no software update needed).

Anyway, if you're used to using Ping on iPhone or iPod touch, there are no surprises here. It's just bigger. Much bigger. There are the same three tabs: activities, people, and profiles. You can comment on what's been posted (even by you), but otherwise it's... for good or ill it's Ping. And if you've enabled the new Twitter integration, it'll auto-tweet every song you like.

If you've tried it out, let us know what you think. For more, check out our complete iOS 4.2 for iPad walkthrough.

As part of the steady march towards iOS 4.2, Apple has released Mac OS X 10.6.5. Beta versions of this OS were said by developers to be necessary to enable iOS 4.2 iPhone and iPad AirPrint support for networked printers. Now, however, there have been rumors networked AirPrint support has been postponed or cancelled.

We'll try it out with the iOS 4.2 GM but we likely won't know for sure until the release version of iOS 4.2 hits, hopefully soon.

If you've updated to 10.6.5 and have iOS 4.2 GM, let us know if it works for you!

Apple sent out an email to developers today reminding them to get their apps ready for the impending arrival of iOS 4.2:

iOS 4.2 is the grand unification update, the software that brings iPhone, iPod touch, and for the first time, iPad all onto the same version number and at the same time. Yes, it's the one firmware to rule them all.

Announced during Apple's 2010 special music event, for iPad's that have been running iOS 3.2 since launch back in April, the change is nothing short of a revelation. Multitasking, folders, and unified inbox from iOS 4.0 join Game Center and TV show rentals from iOS 4.1, and add in AirPlay video sharing and AirPrint wireless printing fresh to iOS 4.2.

Huge.

And we're going to take you through it, after the break!

(Note, if you're interested in iPhone or iPod touch, we've got a complete iOS 4.2 for iPhone walkthrough as well!)

What hasn't changed

Almost everything has changed this time. Likely because there's no weather or clock apps to ignore. Still, there doesn't seem to be anything new in Contacts yet, but we'll keep our eyes peeled.

Huge update, we told you.

Hardware changes

No, that's not a typo. As you're read below, Apple has added a software orientation lock to iOS 4.2 for iPad, similar to how it works on iPhone. That means the previous, hardware-based orientation lock is no longer needed, so they've made that a mute switch like on iPhone. Yes, they really changed a hardware button. Yes, it will make iPhone owners less confused but it will mess with existing iPad owners.

Either way, be advised.

System-wide enhancements

Many of the system-wide enhancements that came with iOS 4.2 for iPhone were already present in IOS 3.2 for iPad -- spellcheck, text replacement, etc. And unfortunately, there's still no sign of VoiceControl, which both iPhone and iPod touch have. There is, however...

AirPlay is an evolution of Apple's AirTunes system that used to let you stream music between iTunes on Windows or Mac and Apple TV or Airport Express connected speakers. AirPlay takes that to the next level, letting you stream video and pictures as well as music from iPad (or iPhone or iPod touch) and the new 2010 Apple TV. Built-in apps like iPod, Video, and YouTube can stream, but unfortunately it looks like all other apps, including Apple's own Safari and all App Store apps are currently limited to audio-only. Whether this is intentional or Apple simply ran out of time and didn't finish making public APIs for video is unknown but hopefully this will be expanded upon in a future update.

You can tell AirPlay is an option when its icon appears to the right of the volume slider. It looks like a TV-style box with a triangle being inserted up into it. (Yeah, seriously). AirPlay compatible apps, when AirPlay compatible devices are present, will show the AirPlay icon as a button. Tap it and you get a list of devices you can stream to. Tap one and your video will switch from iPhone to TV. And since it's called AirPlay and not AirView, here's hoping Apple also expands the functionality in the future to project game video onto the big TV screen, leaving iPhone and iPod touch as a full on multitouch game controller. Hey, we can dream…

AirPrint is Apple's wireless printing service. By the time it ships, it should be able to send pages to almost any printer on the same Wi-Fi network, or to certain printers directly (HP ePrint have already been announced). Needless to say, this answers one huge piece of previously missing functionality. (The one it doesn't answer, and still isn't answered, is easier file transfer and sync).

Yes, you can finally -- finally -- control volume, skip tracks, and do pretty much anything your stereo Bluetooth headset allows. Unfortunately, at least in my tests, volume changes on the headset don't show up on the iPhone's volume slider -- but they do work in both iTunes Store streaming and iPod apps.

Home Screen

SpringBoard, the app that runs the home screen and overall interface in iOS, finally gets the iOS 4 crown jewels of multitasking and folders, but there are a few small changes to go through first.

The little northeast pointing arrow that indicates a location-based service is running, be it Wi-Fi mapping or aGPS, now shows up in the status bar along the top, just like iOS 4 on iPhone.

The red bar that shows background VoIP is here, long and thin though it may be. (And yes, tapping it does indeed take you right back to your VoIP/Skype call).

There's more control inside Settings for Spotlight, but nothing in the search interface itself that we can find yet. If Apple were to create a true universal search, including for settings, app content, etc. like webOS 2.0 or BlackBerry OS 6, that would terrific.

While Apple's built-in apps (like iPod, Mail, etc.) have had background multitasking since iOS 1.0 for iPhone and iOS 3.2 for iPad, with iOS 4.2 it finally comes to 3rd party App Store apps.

As to how it works, instead of a traditional "leave full apps running in the background" approach, Apple instead chose to implement a more restricted but, they felt, better performing and power friendly solution involving 7 specific background API (application programming interfaces.)

Local notifications

In addition to the existing push notification service from Apple's servers, which provide sound, badges, and alert popups for everything from IM to VoIP calls, to game challenges, iOS 4.2 adds local notifications so something like an alarm-clock app could register an alert that would sit in the iPhone in the background until the proper time, then activate. That takes the online server out of the equation which is good for tasks that don't need additional information from the cloud, and so don't have to activate the radios.

Task completion

There's another API for task completion so that, for example, if you're uploading a picture to Flickr and leave the app, it can register a thread to keep uploading the picture in the background while you do something else. That means the entire app doesn't have to keep running, freeing up memory and lightening battery load, and even the thread will terminate when the upload is done.

Fast app switching and saved state

Fast app switching deals with the perceptive speed that multitasking offers. With iOS 3.2 if you left an App Store app it would shut down completely. If you went back -- regardless if it was a second or a week or later -- it would usually restart not from where you left off but from the beginning. A few developers tried to add persistence on their own, saving your place when you came back as best as previous OS versions allowed, but most didn't -- especially games. Also, if you closed one app and went to another, you could theoretically be stuck swiping back or forth between 11 home screen pages. And with a 9.5-inch screen, that could be a lot of swiping!

Saved state is now built into iOS 4.2 for iPad. If you switch out, Apps have their currents state recorded to memory and if/when you go back, the app checks the memory save and resumes from that state.

To enable fast app switching, Apple's created a new UI metaphor. Now, when you double tap the home button, the screen turns translucent and slides up, allowing you to peek at the apps running "in the background". (Technically frozen with state saved and threads registered with the background API).

Apps in the fast switcher UI are sorted in order of last usage. That means, if you're moving between a set of commonly used apps, they're most likely right next to each other and not screens and screens away. These two elements combine together to make launching apps perceptively much faster, even though the apps don't have to be running in the background consuming resources just for that convenience.

Positionally the fast app switcher replaces the space traditionally reserved for the Dock, so while it's a tad confusing the concept of apps at the bottom of the screen being more permanent and easily accessible remains. Behaviorally, while they look like a secret Dock, they function like the Home Screen itself in that you can swipe from right to left to scroll through a several 4-icon sets of multitasking apps.

Given iPad has only 256MB of RAM, we assume Apple will discretely kill off the least-used app in the stack when things get tight or a certain amount of time passes. That means, yes, sometimes you will come back to that game and have it start over rather than resuming, but resources on mobile devices -- they be constrained.

(Here's also hoping iPad 2 gets 512MB of RAM like iPhone 4 did.)

iOS 4.2 helps users visualize what's going on when switching apps by introducing a new, carousel-like animation. It's a bit different than the carousel style used in iPhone and iPod touch, more like panels swinging around, but it works well. The new animation occurs when you switch between two apps either via the new, double-click-Home to trigger to launch the multitasking UI, or when one app calls another app (i.e. when you're in Contacts and you tap to send a contact an SMS).

Launching or leaving an app retains the same, zoom-based effect as always.

Interlude: Task Killing

At the iOS 4 event, Steve Jobs likened task managers (in the multitasking, not to-do sense) to styluses -- if you need them there's something wrong. Initially this created confusion in iOS 4 when it was noted, if you hold your finger down on multitasking apps, they'd jiggle and bring up a delete icon that, if tapped, removed them. So um, yeah.

It appears like there's a couple things going on. First, with built-in Apple apps, like Mail, if you "delete" it from the fast app switcher, the service will re-spawn immediately so you will still receive Mail (it doesn't kill the background thread that checks, sounds/vibrates, and updates the badge). However, the respawn will sometimes fix issues of mail not loading properly, for example.

For App Store apps, if you "delete" them it flushes their saved state and forces them to reset and reload when next you launch them, i.e. they won't resume from the previously saved state and their threads seem to be restarted.

And yes, you can still hold down the Sleep/Wake button until the red Shut Down slider appears, then hold down the Home button until you return to the home screen, and that will flush the RAM and give you a general reset.

Widgets

Just like to the left of the main home screen is a special Spotlight screen, to the left of the fast app switcher is a special widget dock containing a software version of the iPad's previous hardware orientation lock control.

That's right. The hardware orientation lock button has been reassigned as a mute switch, to match the iPhone, and now orientation lock is software based. Unlike the iPhone, however, you can lock in both portrait and landscape mode.

More over, there are three circular music controls to skip back/rewind, play/pause, or skip ahead/fast forward whatever audio is currently queued up (including streaming music). Whichever app is currently playing the music, be it iPod, iTunes or Safari (streaming podcasts, for example), or an App Store app (like Pandora or Slacker) is shown at the right so you can jump back to it and access further controls.

iPad 4.2 also gets something more than iPhone -- it gets all the widgets in one dock, and it gets a brightness slider thrown in to boot. The extra screen real estate pays off with instant access to crank things down for reading or up for watching movies.

The presentation may not be as visually slick as Palm webOS' Card view (which looks like iPhone Safari's Page view) or Mac OS X Expose mode, but it keeps tens of millions of existing iPad users grounded in the interface they're familiar with and that's what Apple is prioritizing.

Background music, location, and VoIP

Speaking of streaming music, perhaps most famously, Apple is allowing apps to register three specific types of threads for persistent backgrounding (they can just keep running until you close them). Again, this isn't the whole app running, just one thread from the app, so the idea is it won't slow down performance, use up memory, or drain battery to the same degree. These API are for streaming music, location, and VoIP (voice over IP).

This means you can listen to Pandora, Slacker, etc. while surfing the web. Navigon, TeleNav,TomTom, etc. can keep using the GPS and alert you to directions while you're on the phone, and to further save resources, non-critical location apps like FourSquare, Gowalla, Loopt, etc. can be alerted when you change cell towers. Fring, Skype, Line2, etc. can answer calls and receive messages when you're not in the app, making them more equal telephony citizens.

What's still missing are background API for timeline updates, so that IM, Twitter, RSS, etc. could update like Mail does and have new messages ready and waiting when you return to the app. Also, there's no API to let internet sessions like SSH, RDP/VNC remain active when you exit an app making it more onerous for network administrators and others to manage remote machines. Hopefully these can be added in future revisions.

There are umpteen hundreds of thousands of apps in the App Store, tens of thousands specifically for iPad, and more and more every day. With iOS 3.2 on iPad we had 11 pages for 180 apps viewable, but you could install many more and use Spotlight as a way of finding and launching them. And Organizing them efficiently? Forget about it.

Enter Folders. A Folder is simply a grouped icon that holds up to 20 other icons inside it. (And for those keeping count at home, the new math means a whopping 3600 apps can be kept available at once. Super hudder).

The way it works is you tap a Folder icon and once again the Home Screen fades and splits open, this time below the Folder. Inside the split are all the apps contained in the group.

To create a Folder, you begin by tapping and holding an icon to put it in jiggly mode, just like you did before to delete or move it. Then, drag it over and drop it on top of another icon to create a Folder. (This works better when icons aren't at the right edge of the screen, as the "get out of the way" behavior sometimes supersedes the Folder behavior, causing the icon to wrap to the next line before you can drop on top of it.) Once created, iOS reads the apps' category data and tries to name the folder for you, but you can easily edit it and change it to anything you want.

As you add apps to a folder, tiny representations of the apps icon appear inside the folder icon in a 3x3 grid. Since iOS 4.2 on iPad supports more app than the iPhone version, 20 instead o 12, as you add more than 9 apps, the grid of tiny icons scrolls up to show the new apps being added. Since 20 isn't divisible by 3, when you hit 19 or 20 that row contains only 2 icons. Once you leave jiggly mode, the folder icon scrolls back down to show only the first 9 icons again. So, if you need visual reminded for certain apps being in certain folders, make sure you add them first so they'll be visible.

To remove apps from a Folder, put them in jiggly mode inside the Folder and drag them out (or just delete them if you don't want the app anymore at all). You can also move them around within the Folder to customize their order.

Folders can be put in jiggly mode and moved as well, but not deleted (they can only be deleted by removing all the apps from within them, and which point they self-destruct for you). You can even move them to the Dock, which means you could have 120 apps readily available at any time for quick launching.

You can also manage them from iTunes 10's app interface if a mouse and keyboard helps you speed up the process. (Oh, the irony.)

And while you still can't delete Apple's built-in apps, you can take the ones you're not using and hide them away inside a folder so they waste as little Home Screen space as possible.

Again, not as visually exciting perhaps as Mac OS X's Stacks, but it keeps current iPhone users in a familiar interface while adding much-needed functionality.

Calendar

Calendar app appears to be functionally identical to iOS 3.2 but for the color scheme. The shades are all pastel now, just like iPhone on iOS 4.1. Full on Miami Vice light purples and greens and peaches and tones only Prismacolor has names for. No idea what this change was about.

Notes

Notes finally -- finally lets you change fonts. That's right, if Marker Felt was never your thing, you can now jump into Settings and switch it to Chalkboard (essentially Marker Felt with a shave and a haircut), and Helvetica, used by the rest of the interface.

Curiously -- and frustratingly -- there doesn't seem to be AirPrint support for Notes.

Maps

A minor tweak, but the current location/current direction button changes from the previous crosshairs to a north-east pointer to match the new location services icon used in the title bar, much like the iPhone's did under iOS 4.0.

Video

Video, the app that unlike the iPhone but like the iPod touch houses all movie, TV, and video podcasts on iPad, enjoys AirPlay integration so all of the preceding should be able to easily stream to the 2010 Apple TV (and perhaps 3rd party AirPlay devices one day, if any offer video support).

YouTube

YouTube only gets a minor update this time, which is kind of disappointing given how great YouTube has been making YouTube.com work for iOS devices. In any event, if you've ever wished you could give a YouTube video the old thumbs up or thumbs down right on your iPad, the you're in luck.

And, of course, the AirPlay is right there, giving us hope any HTML 5 video will be instantly transportable to the TV.

iTunes Store

iTunes store gets AirPlay too in case you want to stream a video podcast and shoot it over to your 2010 Apple TV. Speaking of streaming, thanks to iOS 4.2 background audio, streaming on iPad is now as rock solid as it's been on iPhone since 4.0.

Most of the time you can scrub and it re-buffers and keeps playing flawlessly. You can stop it and come back hours or even days later -- even after using the iTunes app to search for other things or the iPod app to play different audio -- and it still knows where you left off and starts playing again instantly without missing a beat. I almost never download podcasts anymore. That's how good the streaming is now (especially if you're mobile with an iPad 3G).

Ping isn't exclusive to iOS 4.1 -- it's already available to iOS 4.0.x users -- but Apple is touting it as a new feature and it's being launched at roughly the same time, so it makes some amount of sense to fold it in here for easy reference.

A social music network, Ping debuted with iTunes 10 but only became accessible on iPad with iTunes 10.1 and iOS 4.2. You get to it via the double talk bubbles tab, bottom middle. If you haven't yet synced your iPad with iTunes 10.1, you'll get a Ping splash screen telling you to do so. Why it can't just ask for your login like Twitter or Facebook and even Apple's own Game Center is beyond me. Cut the tether already.

Once you've signed on, the Ping tab will come up with the Activities view. Activities show what's going on with the people you've followed -- status, pictures, and videos from recording artists like Lady GaGa, and comments, likes, and shared music from friends. It gives you the ability to like or comment on any of those things and, of course, instant access to preview and purchase the music being liked or commented on in iTunes. That also means there's currently no way to share or discuss music that's not in iTunes, specifically in your local country's iTunes store, which can be frustration for Beatles fans in the US, and fans of far, far more artists internationally.

Actions are fairly simple. To like or add a comment to an activity, tap the appropriate button. To preview or purchase a song that was posted, tap anywhere on the song widget, from album art to title. To be taken to the song's album, double tap on the title.

The People tab gives you a list of people you follow and people who follow you, as well as a featured button for a list of recording artists.

Tapping on a person gives you profile page with recent activity and an easy follow/stop following toggle. You can also switch to an info view that contains a short bio and buttons to see the person follows and who follows them. Similar to Twitter, people can either let anyone follow them or decide to approve followers on a person to person basis.

The My Profile view, as the name suggests, shows you your own recent activity and, at the bottom, has a button for My Info that shows you your own profile. You can't (yet?) edit this info on iOS, however, and will need to go back to iTunes 10 on Mac/Windows for that.

I'm not sure if it's the blank loading screen, but iTunes Store has never felt like the snappiest app on iOS and including Ping inside it likewise makes it feel less snappy than Twitter or Facebook. It also doesn't seem to save state of, or cache, the tabs - perhaps because they're web pages being re-loaded each time - which makes the experience of moving between apps seem sluggish. There's also no refresh feature, you need to switch between tabs to check for new data, and sit through more reload screens...

At least Apple finally added social integration, albeit by way of Twitter and not Facebook as they'd originally tried. Most of that seems to live inside the desktop iTunes, where you can link your Twitter account, find people you follow on Twitter, and friend them on Ping as well. What you like on Ping then gets tweeted to your Twitter account. That could be to your liking or incredibly not.

The other addition is TV show rentals. They're only available in the US and from ABC (whose parent company, Disney, counts Steve Jobs as its biggest share holder), and FOX (whose owner, Rupert Murdoch, sees mobile devices as a way to save old media), and cost $0.99 per episode. You have 30 days to start watching and 48hrs. to finish once you start.

Ping hasn't show up in iOS 4.2, but since the UI is web-based Apple can update it at any time, so it's almost certainly will be coming to the iPad with this release. We'll update when it shows up. It will be interesting to see what Apples does to balance the rather awkward iTunes Windows/Mac UI with the fairly standard iOS on iPhone UI.

App Store - iAds

App Store, like iTunes Store is mostly just a thin app container around constantly updated web content, but Apple has snuck something new in this time, if not for users than at least for developers. And yeah, we're talking about iAds...

Okay, so iAd really shouldn't be considered a feature, at least not for users, but it will be a feature of iOS 4.2 for developers, and it will go in apps, so we're mentioning it here.

iAd will provide developers with an easy-as-Xcode way to place advertising in their apps, both paid and free. Apple is setting a high bar for their ads, however. No simple Google-style text, annoying punch-the-monkey, or jarring transition out of the app and into the browser, they claim to want great looking, highly interactive, emotionally compelling content that will connect with rather than alienate users. Served every 3 minutes...

Settings

Settings is a boring app that often contains a great number of terrific surprises when it comes to Apple iOS updates. iOS 4.2 for iPad is no exception.

iPad gets all the wallpapers that iPhone got with iOS 4, some of them re-rendered to look even sharper on the big 9.7-inch screen.

Since Apple is, post Google-breakup, awfully serious about user privacy, Location Services get a new Settings tab that lets you turn them off completely, but also turn them off in each app separately if you like.

iOS 4.2 brings alphanumeric passcodes to iPad by default (no more configuration file required). Turn it on and you can have a nice, strong, even gnarly pseudorandom string... if you can remember it.

And yes, you get the Vader-black keyboard standard if you flip that switch.

To the list of things you can lock down and lock out, iOS 4.2 adds Deleting Apps, no doubt to the cheers of parents with young children everywhere. You can also prevent changes to location services (so your kids can't stop you tracking them, unless they're hax0rs) and email accounts.

If you don't want them playing multiplayer Game Center games, you can stamp that out as well. You can even turn off friend requests.

iOS 4 spell check causing more problems for you than it's fixing? No problem, you can now turn it off.

Gmail is dead, long live Google Mail.

Inside MobileMe, Google Mail, or other IMAP accounts, you can choose whether or not to enable sync. Again, there's no support for Exchange ActiveSync accounts yet (including Gmail via GoogleSync).

Because mail now supports threaded email messages, Settings now gives you the option to turn that feature on or off.

Notes now has its own Settings tab because, as mentioned previously, you can now change the font in Notes, and here's where you do it.

You can also choose the default account for Notes sync if you have more than one IMAP mail account set up.

Game Center

Game Center, Apple's social gaming network went live with iOS 4.1 for iPhone and iPod touch and comes to the iPad with iOS 4.2. As of this writing, Apple has a Game Center section set up in the App Store to help you find games that support it. To start off, you can create or login to an account, update your status, and add friends.

And yes, on iPad Game Center takes advantage of the full screen. You get a double column-view instead of single like on iPhone, and that means your lists (like friends) will on the left and the detail view (like stats) will be on the right.

Also, the sign in/welcome screen currently shows a number of app icons "dealt" card-like across Game Center's game table style UI. Tapping them does indeed take you to the App Store to get the game.

You can also see a list of your games that support Game Center. Tapping on one gives you general info and the ability to hit Play and go straight to the game. Tapping on Leaderboards lets you see top scores for Today, This Week, and All Time.

Achievements shows everything you can earn for playing the game.

Safari

iOS 4.2 finally gives iPhone, iPod touch, and iPad the ability to find text on a Safari web page. This is similar to Windows or Mac, where you just hit CTL-F or CMD-F, type your text, and off you go. On iPad Safari you use the regular old search field (still confusingly labeled Google by default) and start typing the text you want to find.

Where previously you only got suggested search terms, now you get an additional section at the bottom to find the word on the page. Tap it and the first match on the page is highlighted in yellow and a set of buttons slide up on the bottom for "Next" and "Done", as well as a counter for how many matches of the word there are on the page, and which one is currently highlighted (e.g., 7/16). Hit next until you find the one you want, hit done when you're finished. If you want to change the find term, the search box is repositioned alongside the controls to make it convenient.

No more tedious manual scanning, no more javascript bookmarklet workaround. Just happy surfing.

The previous + icon, for adding bookmarks and Web Clips is gone, replaced by the Action button found in other apps. Hitting the action button gives you all the same options as before, but now also includes AirPrint.

AirPlay will show up inline for videos where compatible but is currently limited to audio only.

Behind the scenes, Apple has added support for the accelerometer and gyroscope and generally improved HTML 5 support. (That means the potential for more, better web apps in the future.)

Mail

iOS 4.2 for iPad Mail gets a unified inbox just like iPhone has had since iOS 4.0. For those with multiple email accounts whose previous iPad experience involved tapping into and out of those boxes many, many times a day this is a hugely welcome addition.

Unlike iPhone, the split column view of iPad lets you see your inbox choices on the left in landscape mode and in popover in portrait so it can be even faster to move around. The list includes all Inboxes, a specific account's inbox (which is considered fast inbox switching), or into the complete folder and sub-folder system of a given account (how Mail has worked in iOS 3.2).

Once inside, All Inboxes is visually indistinguishable from an account-specific inbox, it simply contains all of their messages.

What is distinguishable are the carets (technically greater-than symbols) to the right of certain messages that indicate a message is part of a thread. A number, typically 2 or 3, accompanies the caret to indicate how many replies are in the thread.

Tapping on a message that's part of a thread gives a second list of all messages in the thread. Tapping on one of them shows you the message in the main column.

A thread view contains a small vertical bar at the top with the subject of the thread and time of the most recent reply. A button to the top left of the message contains the name of the inbox you came from so you can back out again, leave the thread completely, and see all your messages.

So yes, the tap, tap, tap of inbox navigation persists, albeit shifted from moving into and out of inboxes to moving into and out of threaded messages.

Great news for heavy ActiveSync users, iOS 4 supports multiple accounts. So, for example, you can now have your work Exchange server and home Google account both set up to push through ActiveSync (which is what Google Sync users behind the scenes) at the same time.

Also for Gmail users, the Delete button has now been properly renamed as Archive (since Google really doesn't want you deleting anything if they can possibly help it), and the trashcan replaced with a storage box icon.

Lastly, in iOS 3.2, when you wanted to abandon an email, you would hit Cancel and get options to Save (store the email in Drafts), Don't Save (trash the email), and Cancel (go back to writing the email). The naming of these options was likely too confusing so in iOS 4.x they've been replaced with a big red Delete Draft button (to trash the email) and Save Draft.

Photos

Photos get a bump in the functionality department, primarily through the Action button getting AirPrint. Just tap, choose a compatible printer, and your photos go wirelessly from iPad digital to hardcopy ink or laser.

Photos also get AirPlay and you can swipe through them and watch them change on Apple TV. Unfortunately AirPlay for video isn't supported.

iPod

iPod on iOS 3.2 for iPad was fairly well rounded already, so the bump up to 4.2 seems fairly minor at this point. You get AirPlay, so you can send music to Air Port express speakers, or video to the 2010 Apple TV.

Availability

iOS 4.2 is a free update currently in Gold Master (GM) for final testing, and unless anything major comes up, it should be released this week.

Conclusion

iOS 4.2 on iPad is a revelation. It's the way iPad is meant to be. That's not to say it's perfect or has every feature on every geek's wish list -- it certainly doesn't -- but it has enough new functionality to make iPad much more valuable.

Like with iOS 4 on iPhone, multitasking and folders extend the existing UI in a way that gives power users what they need, but keeps casual users either grounded in familiar metaphor, and feature-phone types blissfully unaware it's even there.

AirPrint addresses an important bit of functionality for home and business alike, and AirPlay has the potential to turn the TV video scene upside down.

Sure, non-obtrusive notifications, and glanceable, lock-screen widgets -- and hey, AirEasyFileTransfer -- would be grand, but iOS 5 beta is only 4 months or so away...

For now, we'll just thank Apple's iOS team again -- this is one hell of an update. If you notice anything we've missed, send us an email or drop a note in the comments and we'll add them to the next update.

iOS 4.2 for iPhone is small update to iOS 4 and iOS 4.1 that adds marquee new features like AirVideo and AirPlay, fixes some bugs, but most importantly brings the iOS platform into grand unification, with iPhone, iPod touch, and -- finally -- iPad all on the same version number.

(Note, if you're interested in iPad, check out our complete iOS 4.2 for iPad walkthrough as well!)

If you don't have time (yet) to read this through this whole article and are eager to get the basics down now, there's a video up top to tell you everything you need to know in just over 5 minutes.

We're showing it off on an iPhone 4 and an iPod touch 4. Functionality is almost identical, just the telephony (i.e. text tones) don't work on iPod touch 4, of course.

What hasn't changed

We'll be covering what's new and improved below, so for what hasn't changed be sure to check out our massive iOS 4 walkthrough and iOS 4.1 update walkthrough because we won't be repeating all that here.

System-wide changes

AirPrint is Apple's wireless printing service. By the time it ships, it should be able to send pages to almost any printer on the same Wi-Fi network, or to certain printers directly (HP ePrint have already been announced). Needless to say, this answers one huge piece of previously missing functionality. (The one it doesn't answer, and still isn't answered, is easier file transfer and sync).

AirPlay is an evolution of Apple's AirTunes system that used to let you stream music between iTunes on Windows or Mac and Apple TV or Airport Express connected speakers. AirPlay takes that to the next level, letting you stream video and pictures as well as music from iPad (or iPhone or iPod touch) and the new 2010 Apple TV. Built-in apps like iPod, Video, and YouTube can stream, but unfortunately it looks like all other apps, including Apple's own Safari and all App Store apps are currently limited to audio-only. Whether this is intentional or Apple simply ran out of time and didn't finish making public APIs for video is unknown but hopefully this will be expanded upon in a future update.

You can tell AirPlay is an option when its icon appears to the right of the volume slider. It looks like a TV-style box with a triangle being inserted up into it. (Yeah, seriously). AirPlay compatible apps, when AirPlay compatible devices are present, will show the AirPlay icon as a button. Tap it and you get a list of devices you can stream to. Tap one and your video will switch from iPhone to TV. And since it's called AirPlay and not AirView, here's hoping Apple expands the functionality in the future to project game video onto the big TV screen, leaving iPhone and iPod touch as a full on multitouch game controller. Hey, we can dream...

Home Screen

SpringBoard, the app that runs the home screen and overall interface in iOS, gets its multitasking dock UI tweaked. Now, after you double press the home button to bring up the fast app switcher, you can swipe left to get to the audio controls and orientation lock as before, but you can also swipe left again to get to a new volume slider and AirPlay control.

Since iPhone has hardware volume controls, it may seem a little redundant, but perhaps it will independently control AirPlay video in the future.

Messages

Messages gets an extra button at the very top of the threaded view that, right in the middle between call and contact info -- FaceTime.

When you're exchanging SMS or MMS, just tap it to launch into a FaceTime video call (if you're both on an iPhone 4 or iPod touch 4, and on Wi-Fi, of course...)

Photos

Photos gets AirPrint now so you can quickly snap a shot and beam it to a nearby printer. Ultra-modern technology meets age-old media memories. Just tap the action button and, not surprisingly, print will be a new option at the bottom.

Print is also now an option when you multi-select.

What is surprising, however, is that there's no AirPlay button in the Photo app when it's playing movies. Since quickly recording a home movie and beaming it to our TV is one of the features we love most, that's a bit of an annoyance. Hopefully Apple will add that in an update.

YouTube

YouTube gets AirPlay, of course, so you can beam YouTube videos to Apple TV... which has a built-in YouTube app already. However, the convenience of being able to play an already-found video on the big screen rather than having to look for it again is certainly appreciated.

Also, gone are the old star ratings and in their place are the cheesy thumbs up and thumbs down. From a scale of 5 to a scale of 2? It's simpler and more YouTube, if missing the subtle iTunes-like gradations of the past.

Notes

Notes finally -- finally! -- lets you change fonts. That's right, if Marker Felt was never your thing, you can now jump into Settings and switch it to Chalkboard (essentially Marker Felt with a shave and a haircut), and Helvetica, used by the rest of the interface. Here's a mockup we created to show all three fonts together for comparison's sake.

Curiously, there doesn't seem to be an AirPrint option in Notes. It would certainly be handy.

Voice Memo

iOS 4.2 for iPhone brings with it a new Voice Memo icon and with it the most drastic redesign of a built-in iOS app icon to date. Sure, Calculator got a facelift recently, but it retained that pseudo-realistic look and feel Apple used for the other "utility" apps, like Compass and Camera. Voice Memo goes from faux microphone to strictly white icon, similar now to Phone or iPod, but without the diagonal pin stripe. If it was in the dock it might fit, but grouped in the default Utility folder, it kind of sticks out.

iTunes Store

iTunes store gets AirPlay too in case you want to stream a video podcast and shoot it over to your 2010 Apple TV. What, you wanted something as big as iOS 4.1's Ping?

Settings

As always, Settings is the least glamorous built-in app in the lineup that just so happens to get a bunch of tweaks and changes to support new features added to the system and flashier apps.

You can now prevent the physical hardware volume buttons from affecting ringers and alerts, if you so choose.

The good news for iPhone users is, Apple has finally increased the number of text tones. The bad news is, most don't seem well suited for use as text tones, and while you can now set personalized tones for different contacts, you still can't buy or create custom text tones.

New tones include Anticipate, Bloom, Calypso, Choo Choo, Descent, Fanfare, Ladder, Minuet, News Flash, Noir, Sherwood Forest, Spell, Suspense, Telegraph, Tiptoes, Typewriters, and Update. You can hear samples from each in the video at the very top of this walkthrough.

You can now prevent people (i.e. your young children) from deleting apps. It's amazing how fast a 4 year old can yank everything from the dock and obliterate every app on your home screen. No longer. Parents of the world rejoice. You can also prevent the little tykes from changing Location Services (e.g. GPS) and email accounts.

You can also now prevent your kids from accepting Game Center friend requests, thus ensuring their online play remain strictly anti-social and (potentially more) secure.

Interestingly, when setting up a MobileMe account, you're now presented with the opportunity to enter either your MobileMe or Apple ID credentials. We'll have to wait and see what, if anything, this means.

Notes now has its own Settings tab because, as mentioned previously, you can now change the font in Notes, and here's where you do it.

Phone + Contacts

In both Phone and in the Contacts apps proper, you can now choose to set a distinct text tone (SMS/MMS) for each contact. So if you want mom to remain good old Tri-Tone but dad to be Choo Choo, have at it!

Just tap edit, scroll down to Text Tone, and then choose from the same list shown in Settings, above.

Safari

iOS 4.2 finally gives iPhone and iPod touch the ability to find text on a Safari web page. This is similar to Windows or Mac, where you just hit CTL-F or CMD-F, type your text, and off you go. On iPhone Safari you use the regular old search field (still confusingly labeled Google by default) and start typing the text you want to find.

Where previously you only got suggested search terms, now you get an additional section at the bottom to find the word on the page. Tap it and the first match on the page is highlighted in yellow and a set of buttons slide up on the bottom for "Next" and "Done", as well as a counter for how many matches of the word there are on the page, and which one is currently highlighted (e.g., 7/16). Hit next until you find the one you want, hit done when you're finished. If you want to change the find term, the search box is repositioned alongside the controls to make it convenient.

No more tedious manual scanning, no more javascript bookmarklet workaround. Just happy surfing.

The previous + icon, for adding bookmarks and Web Clips is gone, replaced by the Action button found in other apps. Hitting the action button gives you all the same options as before, but now also includes AirPrint.

AirPlay will show up when you're playing videos in Safari but currently only supports audio.

Behind the scenes, Apple has added support for the accelerometer and gyroscope and generally improved HTML 5 support. (That means the potential for more, better web apps in the future.)

With this support, Augmented Reality is now possible as well, right in Safari.

iPod (Music/Video)

As we're sure you guessed by now, the major addition to the iPod app for iPhone (and Music and Video apps for iPod touch) is airplay. So, you can send any music to Airport express speakers, or video to the Apple TV (2010).

iOS 4.2 pricing and compatibility

iOS 4.2 is a free update for iPhone users and for iPod touch users.

Compatibility should be the same as with iOS 4.

• iPhone 4, iPod touch 4 (2010): All features
• iPhone 3GS and iPod touch G3 (2009): No features requiring iPhone 4 or iPod touch 4-type hardware (i.e. front facing camera)
• iPhone 3G and iPod touch G2 (2008): No features that require higher processor or RAM
• iPhone 2G and iPod touch G1 (2007): not compatible/no update

We'll update as soon as we find an official list from Apple.

Conclusion

While iOS 4.2 for iPhone and iPod touch is nowhere near as significant an update as iOS 4.2 for iPad, that's only because iPhone and iPod touch have enjoyed iOS 4 features since June. From small but long missing features like Find in Safari, to annoyances like Marker Felt in Notes, to the start of individual Text Tones in Messages, Apple is continuing the steady improvement of iOS.

It's still not perfect, it still suffers from the age-old gripes of poor notification handling among other things, there's still no good, SIRI-infused, OS-wide VoiceControl system, etc. etc. but those are not the stuff of minor updates. iOS 5 will no doubt be previewed in 4 months or so and then we'll see to the bigger issues.

For now iOS 4.2 not only does what it set out to -- unify the iPhone, iPod touch, and iPad on the same release -- but with welcome additions like AirPrint and AirVideo -- if it really takes off -- it could be the beginnings of something transformative.

And as always, If you noticed we missed anything, drop us a note in the comments or send us an email and we'll update as needed.

PwnageTool 4.1 was recently released and a lot of jailbreakers have been waiting for this one.  The main difference between some other methods and PwnageTool is that it preserves your baseband in most cases.  Meaning for unlockers, they'll still be able to safely upgrade and keep their unlock.  We've covered how to jailbreak iOS 4.1 via limera1n and how to jailbreak iOS 4.1 via greenpois0n, and now we'll look at how PwnageTool 4.1 differs and walk through this process as well.

PwnageTool 4.1 will jailbreak the following devices:

• iPhone 4, 3GS, and 3G
• iPod Touch 4G and 3G
• iPad
• Apple TV 2nd Generation

As usual, we take no responsibility for what you may or may not do to your phone.  If you're okay with that, jump through for a regular and video walkthrough!

First you'll need to download the torrent for PwnageTool 4.1 from the Dev-Team blog.  There is an official and a couple mirrors.  Once you've got it all unpacked, continue on.

When you first launch PwnageTool, you'll be asked to select your iDevice model. You'll also notice across the top you'll have two modes, expert and simple.  Simple will install Cydia and a few common addons.  Expert will let you choose what custom applications and utilities you'd like to install.  For this example, we'll just use simple mode on an iPhone 3GS.  If you guys have questions or need help with expert mode, jump over to our jailbreak forums and we'd be glad to help you out.

After you've selected your iDevice, you should click Next and be presented with a screen that asks you to select your firmware version.  PwnageTool is normally pretty good about bringing up the correct one, but if for some reason it doesn't, you can always click browse and navigate to your chosen firmware version.  On the Mac, iTunes puts your firmware under Library\iTunes.  My iTunes has a mind of its own and sometimes firmware doesn't show up. I use the following site for past and present firmware versions quite often:  iPhone Firmware Versions - Past and Present

Just make sure you select the correct firmware if more than one comes up.  You'll then receive this message followed by one asking you if you activate normally.  If you're unlocked, select no. Just follow all the prompts through and PwnageTool will then begin building a custom .ipsw for you that'll save to your desktop.

Once that's done, PwnageTool is going to walk you through putting your phone in DFU mode.  If you're unsuccessful the first time, that's ok, it'll let you keep trying until you get it.  After that, you'll simply open up iTunes and alt + option click on restore and navigate to your custom firmware on your desktop.

And that's it! Once you're iDevice reboots, you should be jailbroken!

AirPrint is Apple’s wireless printing service. By the time it ships with iOS 4.2, it should be able to send pages from your iPad or iPhone to almost any printer on the same Wi-Fi network, or to certain printers directly (HP ePrint have already been announced). Needless to say, this answers one huge piece of previously missing functionality. (The one it doesn’t answer, and still isn’t answered, is easier file transfer and sync).

Currently, in order to test AirPrint, you need iOS 4.2 beta, Mac OS X 10.6.5 beta, and a network attached printer. Oliver Haslam from the I-Blog had all three so he put together a video, after the break.

For more, check out our complete iOS 4.2 for iPad walkthrough.

iOS 4.1 is now available from Apple for iPhone and iPod touch. A relative small update to iOS 4 that fixes some important bugs, adds a few new features, and powers the all new iPod touch 4.

Steve Jobs announced the headlines during Apple's 2010 special music event and they include Game Center social gaming network, TV rentals, iTunes Ping social music network, HDR photography, and HD video uploads. (Yes, Apple is introducing not one but two new social networks.)

More importantly for some, proximity sensor misfires, Bluetooth woes, and the abysmal performance on iPhone 3G appear to be fixed.

We'll be covering all of that and more below. For anything and everything that hasn't changed, check out our massive iOS 4 walkthrough because we won't be repeating all that here

Note: this walkthrough is based on the GM (gold master) version of iOS 4.1. We'll continue to add to and improve it as needed, and update once iOS 4.1 release version hits, probably on Wednesday September 8.

If you don't have time (yet) to read this iOS 4.1 walkthrough and are eager to get the basics down now, here's a quick 5 minute video guide to get your started.

We're showing it off on an iPhone 4, which should be similar to how it will work on an iPod touch 4.

What hasn't changed

Most things haven't changed with iOS 4.1, so again, check out our iOS 4 walkthrough to get up to speed on the far more numerous changes last summer's update brought.

System-wide changes

Yes, you can finally -- finally -- control volume, skip tracks, and do pretty much anything your stereo Bluetooth headset allows. Unfortunately, at least in my tests, volume changes on the headset don't show up on the iPhone's volume slider -- but they do work in both iTunes Store streaming and iPod apps.

FaceTime app

iPod touch 4 gets a brand new, top left icon on the home screen just for FaceTime. (Which makes sense since there's no Phone app from which to initiate a FaceTime call. There's also no phone number associated with iPod touch so Apple/iTunes IDs will be used instead. (That means, if you want to call someone with an iPhone 4, they have to have updated to iOS 4.1).

Once it's set up it works the same -- that is, simply and elegantly.

Calendar - Now in pastel

Calendar app appears to be functionally identical to iOS 4.0 but for the color scheme. The shades are all pastel. Full on Miami Vice light purples and greens and peaches and tones only Prismacolor has names for. No idea what this change was about.

Photos - HD YouTube uploads

iPhone 4, and now iPod touch 4, can record 720p HD video but in iOS 4 those videos would be compressed down to SD when uploaded to YouTube. 4.1 fixes that. Just tap the action button at the bottom right and share HD straight up to YouTube.

Note: HD uploads require a Wi-Fi connection.

Camera -- HDR photography

iOS 4.1 adds HDR photo capability to the iPhone 4 -- but not iPod touch 4 -- Camera app. HDR stands for high dynamic range and usually involves a photo with one or more identical photos that are over- and underexposed and then combined together so that far more light and shadow information is available than a single exposure would allow. These high dynamic range images can then be tone mapped to provide a far greater amount of detail, far more like what the human eye can see. So basically, you can see detail in the sky and in the shadow under the tree, rather than having one blown out or the other lost to black. (That's my lay person, non-photo geek understanding of it anyway).

To enable HDR you simply tap the HDR button, much like the LED Flash button under iOS 4.

Note: HDR photography doesn't seem to work on earlier iPhone models like iPhone 3GS.

Then, when you take the picture, iOS takes not only the regular shot but one overexposed and one underexposed. Shooting the picture seems to take roughly the same amount of time, but saving it takes noticeably longer.

So far, based on the results I've seen here and online, iOS HDR does a good job pulling color and detail back into what were previously blown out skies, but an only okay job revealing detail in shadowy areas.

For non photo geeks, however, all they'll notice is better pictures with bluer skies and brighter people, which is probably why Apple added the feature in the first place.

Apple has also made the camera controls easier to use in landscape mode, rotating them along with the UI.

iTunes Store - Ping and TV rentals

The iTunes Store was originally introduced in iOS 1.2 (iPhone 1.2) as the iTunes Wi-Fi music store and that we're about to talk about features accessible over 3G and involving video shows desktop iTunes isn't the only version growing beyond it's original moniker and focus. With iOS 4.1, new features include the social music network Ping and $0.99 TV show rentals.

Ping isn't exclusive to iOS 4.1 -- it's already available to iOS 4.0.x users -- but Apple is touting it as a new feature and it's being launched at roughly the same time, so it makes some amount of sense to fold it in here for easy reference.

A social music network, Ping debut with iTunes 10 but is also accessible on the iPhone and iPod touch via the double talk bubbles tab, bottom middle. If you haven't yet signed up in iTunes 10, you'll get a Ping splash screen telling you to do so.

Once you've signed on, the Ping tab will come up with the Activities view. Activities show what's going on with the people you've followed -- status, pictures, and videos from recording artists like Lady GaGa, and comments, likes, and shared music from friends. It gives you the ability to like or comment on any of those things and, of course, instant access to preview and purchase the music being liked or commented on in iTunes. That also means there's currently no way to share or discuss music that's not in iTunes, specifically in your local country's iTunes store, which can be frustration for Beatles fans in the US, and fans of far, far more artists internationally.

Actions are fairly simple. To like or add a comment to an activity, tap the appropriate button. To preview or purchase a song that was posted, tap anywhere on the song widget, from album art to title. To be taken to the song's album, double tap on the title.

The People tab gives you a list of people you follow and people who follow you, as well as a featured button for a list of recording artists.

Tapping on a person gives you profile page with recent activity and an easy follow/stop following toggle. You can also switch to an info view that contains a short bio and buttons to see the person follows and who follows them. Similar to Twitter, people can either let anyone follow them or decide to approve followers on a person to person basis.

The My Profile view, as the name suggests, shows you your own recent activity and, at the bottom, has a button for My Info that shows you your own profile. You can't (yet?) edit this info on iOS, however, and will need to go back to iTunes 10 on Mac/Windows for that.

I'm not sure if it's the blank loading screen, but iTunes Store has never felt like the snappiest app on iOS and including Ping inside it likewise makes it feel less snappy than Twitter or Facebook. It also doesn't seem to save state of, or cache, the tabs - perhaps because they're web pages being re-loaded each time - which makes the experience of moving between apps seem sluggish. There's also no refresh feature, you need to switch between tabs to check for new data, and sit through more reload screens...

The other addition is TV show rentals. They're only available from ABC (whose parent company, Disney, counts Steve Jobs as its biggest share holder), and FOX (whose owner, Rupert Murdoch, sees mobile devices as a way to save old media), and cost $0.99 per episode. You have 30 days to start watching and 48hrs. to finish once you start.

To access them, tap the videos tab at the bottom, then the TV Shows tap center top. Tap on a show and you'll get the info screen with full season purchase price. If you want to rent a single episode, double tap the title and you'll get the single episode info screen with rental option.

Double tapping is usually reserved in iOS for zoom, so it's not the most elegant or intuitive way to get at rentals.

A discounted season rental price would be nice, but this is Hollywood, so baby steps. Tiny, tiny baby steps.

Note: if you rent on iPhone, only the SD version will be downloaded. If you rent on Apple TV, you'll get the HD version. Given iPhone's 3.5" screen, SD is probably a better option to save on file size.

Settings

Add new features and you've got to add new settings for those features. Or, as is often the case, you've got to add new settings for features you added in previous versions of iOS. Sill, Settings didn't get as big a bump in 4.1 as it has in the past.

You can lockout Game Center multiplayer games if you don't want your kids social gaming with the unwashed denizens of the internet. Which you probably shouldn't.

iOS 4 spell check causing more problems for you than it's fixing? No problem, you can now turn it off. [9to5Mac]

With HDR photos, you can choose whether to save both the original and HDR version to the camera roll, or just the processed HDR image.

Game Center

Game Center, Apple's social gaming network went live with iOS 4.1 and games continue to be updated to support it. (As of this writing, Apple has a Game Center section set up in the App Store to help you find them). To start off, you can create an account, update your status, and add friends.

You can also see a list of your games that support Game Center. Tapping on one gives you general info and the ability to hit Play and go straight to the game. Tapping on Leaderboards lets you see top scores for Today, This Week, and All Time.

Achievements shows everything you can earn for playing the game.

Games that support Game Center show a brief drop-down when they start.

Phone

New to the Phone app, if you choose to add a number to Favorites, and that number is mobile, and is an iPhone 4, you'll be given a choice of adding the phone number proper, or adding it as a FaceTime connection.

Field test mode, missing from iOS 4.0, makes its triumphant return in iOS 4.1. If you're not familiar with it, field test mode is a diagnostic mode that shows cell reception as actual, meaningful numbers as opposed to nebulous Apple and carrier rendered bars. [Gizmodo]

To enter field test mode, dial:

*3001#12345#*

To exit field test mode, click the home button.

Nike+

The Nike+ app update that was included in iOS 4 beta but missing from the public release returns in iOS 4.1 and looks like it's here to stay this time. It allows you to sync data with the Nike+ servers directly from the iPhone rather than having to sync through an intermediary computer. About time.

[WhenWillApple]

iOS 4.1 pricing and compatibility

iOS 4.1 is a free update for iPhone users and for iPod touch users.

Compatibility should be the same as with iOS 4.

• iPhone 4 and iPod touch 4 (2010): All features
• iPad (2010): Coming this fall with iOS 4.2
• iPhone 3GS and iPod touch G3 (2009): No features requiring iPhone 4 or iPod touch 4-type hardware (i.e. FaceTime)
• iPhone 3G and iPod touch G2 (2008): No multitasking, custom wallpaper, and Bluetooth keyboard support.
• iPhone 2G and iPod touch G1 (2007): not compatible/no update

Conclusion

iOS x.1 point updates are relatively minor compared to the full version releases but this fixes some major bugs, adds a few great new features for iPhone users, and powers a whole new level of experience for iPod touch 4 owners.

Did we really need two separate new social networks in Ping and Game Center, or would a unified iOS/Apple social network have been better? Only time will tell.

If you were waiting on a new notification UI or widgets, well that's not the point of the point release, but iOS 5 is only 6 months from beta so keep the dreams alive.

iOS 4.2, with wireless printing and AirPlay is scheduled for November, however, so there will be more to come for iPhone, iPod touch, and finally iPad users this year as well.

[Thanks to everyone who contributed screenshots and descriptions for this walkthrough. If you noticed we missed anything or got anything plain wrong, drop us a note in the comments and we'll update as needed.]

AppleInsider, quoting "people familiar with the matter" says iOS 4.1 is currently being tested by Apple not only on iPhone 4 (currently available to developers) but the upcoming iPod touch 4 refresh, iPad 2, and an unknown mystery device.

iPod touch 4 is pretty much a no-brainer at this point. For the last 3 years Apple has shipped a new iPod touch in the fall along with an x.1 software update, so we'll consider that a done deal. The iPod 4,1 hardware designation means it will also once again be a major update. Retina display and dual cameras would certainly qualify.

As to iPad 2, also a major update if iProd 2,1 is the proper designator, that might get a camera as well come next spring. However, since Apple hasn't even introduced an iOS 4.x beta for the current generation iPad, it's harder to predict what the iOS 4.x situation will be by then. 4.2 to mirror 3.2 last year?

As to the mystery device, that might just be the iOS Apple TV/iTV we keep hearing about.

Hopefully we'll find out more at Apple traditional fall special music event for iPod and iTunes in the next month or so, but let us know your best guesses below!

Is the just released iOS 4.1 beta reporting fewer bars in more places, just like Apple said their next iOS update would? That's what we're hearing... but not (just?) on iPhone 4 -- iPhone 3GS as well.

iPhone 4 has better reception in better signal areas, worse reception in worse signal areas when "death gripped", and we're hearing that's holding true under iOS 4.1, but again the signal is being reported "better". You see fewer bars in low signal areas, so you have a better idea what will happen if touching it in the lower left hand corner -- it might drop off completely.

But iPhone 3GS? Well on iOS 4 had 5 bars in location x. Same location on iOS 4.1 it's reporting 4 bars when on the table, 3 bars when picked up, and 2 bars when "death gripped".

Here's a vastly over simplified analogy: imagine iOS 4 was a school that gave anyone (any iPhone) who scored over 20% an A (5 bars). iOS 4.1 would be a much stricter school where you had to get an 80% for that A (5 bars.

Just when you thought your folders were organized and cleverly named just right, we're here to turn the naming game up a notch by adding symbols with Glyphboard. I'm sure many of you have a folder filled with Apple apps named "Apple". I definitely do. But why be so boring and predictable when you can name it with the Apple logo instead? To learn how, follow us after the break!

First, you must visit http://mrgan.com/gb/ with Safari on your iPhone. Then follow the instructions to add the website as a bookmark to your homepage. Now, exit Safari and tap the bookmark you just created. This opens a web app called Glyphboard.

Glyphboard includes 48 characters that can be copied and pasted anywhere else on your iPhone such as email, notes, calendar, and of course, folders! Glyphboard also provides a box at the top so you can paste several icons within the web app and copy them all together. This is a time-saver for those of you that may want to use more than one character at once.

Now get to it! Give your folders a unique touch with Glyphboard and share your creativity. Head on over to the TiPb forums and show off your latest folders.

[iPhone J.D. via Daring Fireball]

The dev team recently released a new PwnageTool that will allow you to jailbreak iOS4 on your iPhone or iPod touch. Since we covered that, the dev team has upgraded the PwnageTool to 4.0.1.  This is our walkthrough of  how to jailbreak devices running iOS4. As always here's our disclaimer;

If you're alright with all of that, hit the jump to see if your device can currently be jailbroken/unlocked and how to do it.

Sorry I don't have a video for you guys this time, I had my 3GS swapped due to it bricking hardcore, and I have the newer baseband, but for now, here's a nice walkthrough. I'll update with a video when the dev team has a solution for newer basebands on 4.0.

iPhone Family (Mac Only)

iPhone 4

• Not currently supported, so please don't attempt as you may damage your phone. As with all new hardware, you'll have to wait a bit for an update that supports iPhone 4.

iPhone 3GS

• New bootrom: No
• Old bootrom and haven't ever jailbroken with Spirit but HAVE been jailbroken before: yes, you can jailbreak
• An easy way to tell if you have an older or newer bootrom is to check your serial, if the 4th and 5th digits are 40 or less, you've got an older bootrom. (ie - if my serial was 8B4387323 I'd be okay as my phone's 4th and 5th digits are 38)

iPhone 3G

• Easiest way, just use redsn0w regardless of your situation, it should work, or follow the directions below

iPod Family (Mac and Windows)

iPod Touch G2

• The second generation iPod touch is currently the ONLY iPod touch that is compatible with PwnageTool 4.0.1 at this time.  If you have a first or third generation, you'll have to wait a bit longer. Either follow the directions below for second generation iPods or use redsn0w if you have a non-MC model of the 2nd gen iPod touch, basically older bootrom)

Instructions

Alright, now that we've determined whether or not you're capable of jailbreaking, I'm assuming you'd only be reading this if you're "certain" you can.  Here's what you need to do:

1. Back up your iPhone/iPod in iTunes
2. Download PwnageTool here from the official source or one of the many mirrors
3. Make sure your device is connected and open PwnageTool
4. PwnageTool will ask you to select your device (I always select expert mode by the way, it will give you more choices when building your custom firmware - for iPhone 3G users who would like to activate the multi-tasking functionality, etc, you'll need to select expert mode and further down in the process, you'll be able to select an option that will enable features like multitasking, it may lag though, so consider yourself warned.)
5. Then select Next and PwnageTool will browse for firmwares on your computer. If for some reason your computer does not find them, you can get firmwares from here. (Remember to make SURE you are downloading the correct firmware for your device.  iPhone 1st gen = 1,1 - iPhone 3G = 1,2 - iPhone 3GS = 2,1 - iPhone 4 = 3,1
6. After PwnageTool finds your correct firmware or you have browsed to the firmware you have downloaded, click next.
7. (Simple Mode, skip to step 11) If you selected expert most, you will now get a screen asking you to customize your build, select general at the very least, and typically Cydia packages, if you'd like the pineapple logo instead of the Apple logo, select Custom Logos then click next.
8. Next you will get a screen asking you to partition your space for jailbreak stuff (you don't have to). It'll also ask you if you'd like to activate, uncheck this if you're on AT&T and not unlocking.
9. The next screen will allow you to select custom packages you'd like pre-installed. Select what you want and click next again.
10. Select your custom boot logos or browse for your own and click Next.
11. Select Build on this screen, it'll prompt you for a location to save your custom IPSW, I normally save this to my desktop. (Oh, don't stray too far away from your computer, you'll probably be asked for an admin password at some point during the build process).
12. Once your bundle is done you'll need to open iTunes and put your phone into DFU mode. Simply turn your phone completely off, open iTunes, and hold down your home button until iTunes recognizes there is an iPhone/iPod in recovery mode.
13. Next hold down alt+option on your keyboard and click restore, navigate to your custom firmware you just built and restore from that. If all went well, your iPhone/iPod should reboot jailbroken!

Unlocking iPhone 3G and 3GS

As ultrasn0w now supports ALL versions of iPhone basebands, if your jailbreak was successful, you just need to install ultrasn0w via Cydia and you'll be unlocked!

If you have any questions or concerns with this process, feel free to leave them in the comments, forums, contact me on Twitter @iMuggle, or shoot me a quick e-mail at ally.kazmucha@tipb.com! Happy jailbreaking!

Apple Insider is reporting that, before being removed, a thread in the Apple Discussion Forums confirmed iOS 4.0.1 was being readied for release next week to address bugs -- including the dreaded antenna "hold different" issue (or "death-grip" if you prefer).

iOS (iPhone) 3.0.1 was released July 31, 2009. 2.0.1 was August 4, 2008. 1.0.1 was was July 31, 2007. So next week for 4.0.1? Unusual.

If real, that's good news in that 1) Apple is moving quickly and 2) the reception problem is software related, which means its much easer to fix.

Meanwhile the New York Times Bits blog has a theory as to why Apple didn't discover this problem before the iPhone shipped - at Apple HQ the signal was strong, and when it was taken outside HQ for test, it was in that case that disguised it as an iPhone 3GS -- and insulated the antenna. Ironic much?

So in the spirit of hope we're keeping our eyes -- and mouse-clicks -- peeled for updates... You?

[Apple Insider, NYT Blogs]

One of the big new features of iOS 4 is the ability to organize your apps into folders. Each folder can contain no more than 12 apps and can be placed anywhere you like, including the dock. Folders are completely customizable and the process is simple.

Already a folders-making machine? We want to see them! Head on over to our iPhone Forum and add your screen shot to the showcase. Make sure you tell us how you're organizing them. By category, by workflow? Do you have Folders in your dock? Are you using them to help get things done or just better keep track of your fun? Show us!

Not sure how to set up Folders yet? Read on after the break!

There are two different ways to create and organize your folders. The first is with your iPhone. Tap and hold on an app until it starts to jiggle. Next, drag the the app on top of another app you want to group it with it. The icon of the bottom app will slightly enlarge with a dark boarder and both icons will become translucent. At this point, you can continue holding or release; both actions will open your new folder containing both apps and named something the OS finds appropriate, but you can name your folder whatever you want. To add more apps to your folder, tap outside the folder and drag apps onto the folder icon. Releasing your hold on the app within seconds of placing it on the folder drops the app into the folder but doesn't open it. If you hold the app over the folder for a few seconds, the folder will open so you can place the app at a specific location in the folder. Once you're done adding apps and organizing your folder, press the home button. To remove an app from a folder, just drag it somewhere outside of the folder while in jiggly-mode.

The other method is in the Apps tab with iTunes. The only significant difference is that you're using a mouse instead of your finger, so you must double-click to open a folder. Everything else is the same. Just sync your iPhone when you're done!

Okay, now head on over to the iPhone Forum and show your freshly made Folders off. (You can screen shot them by holding down the sleep button on top of your iPhone or iPod touch while you click the home button below the screen.)

Get to it!

iOS 4 (previously iPhone OS 4.0) continues Apple's relentless yearly mobile OS update cycle. If 2007 was the mainstreaming of the multitouch user interface, 2008 all about the App Store, and 2009 was filling in the feature list, then iOS 4 promises to be... well, that's why we're here.

(And yes, iOS. That's the new name Apple has licensed from trademark-holders Cisco to represent the iPhone, iPad, and iPod touch -- and maybe soon the Apple TV and who knows what else -- family.)

Back on April 8 at the sneak preview event, Apple promised 7 "tent-pole" features and 100+ general user features overall, along with 1500 major new API for developers. We're going to walk you through the ones that matter most.

Note: iOS 4.1 is now available. See our complete iOS 4.1 walkthrough for the latest on Game Center, HDR photography, Ping social music network, and the other new features.

See also our iPhone 4 review for more on hardware specific features.

iOS 4 in 10 minutes: video quick-start guide

If you don't have time (yet) to read this massive iOS 4 walkthrough and are eager to get the basics down now, here's a quick 10 minute video guide to get your started.

We're showing it off on an iPhone 3GS, which should be similar to how it will work on an iPod touch G3. If you're using the iPhone 3G or iPod touch 2G you won't get the multitasking and wallpapers. You'll blame Apple. Apple will blame the hardware. The hardware will try to frustrate you into upgrading to an iPhone 4. You've been warned.

Note: If you haven't updated yet, save yourself some time and potential hassles and go read our getting ready for iOS 4 post first first. Then once you're good to go, sit back, relax, and hit play on the video below.

What Hasn't Changed

As always, we'll start off by telling you what hasn't change so we can clear the deck for what has. For more information on any functionality that's pretty much identical to past versions, check out our previous walkthroughs:

• iPhone 3.1
• iPhone 3.0
• iPhone 2.2
• iPhone 2.1
• iPhone 2.0

And here's a quick list of the unchanged apps in iOS 4:

• Stocks: Similarly, Stocks got landscape and a slew of swipe-able data last time, so the update love gets skipped this time.
• Weather: Almost comedically at this point, it's still unchanged from iPhone 1.0. Still no HTC TouchFlo 3D style animations, no landscape mode with more/different information. Not even a Calendar-style icon update to show current local weather. Nada.
• Voice Memo: Introduced in iPhone 3.0, it looks pretty much the same in iOS 4.
• Clock: With nothing but a lap feature added last time, we lose the "but" and keep the "nothing" for iOS 4.
• Calculator: Upgraded back in 2.0 for landscape scientific mode, all Calculator gets this time is a slight icon tweak towards the red.

(We're not counting getting a resolution bump for iPhone 4 Retina Display as a functional change.)

System-wide enhancements

Spell check, which debuted in iOS 3.2 for iPad, is a system-wide addition to iOS 4 now as well. Words the OS thinks you've misspelled will be underlined in red (familiar to any Microsoft Office or Mac OS X user). Tapping on them will give you a popup containing a recommended replacement. Tapping the popup replaces the misspelled word with the (hopefully!) correctly spelled one.

Combined with the iPhone's existing -- and industry leading -- predictive auto-correct, it's a powerful combination.

Cut, copy, and paste also gets an iPad-debuting feature with "replace" now added to the popup options.

Additionally, if iOS 4 autocorrects a word and you immediately backspace, a popup will appear offering to replace the correction with the originally typed word.

We haven't found any specific documentation on this yet, and it doesn't seem to be listed as one of the options flying by on the on-screen suggestions, but per the comments below asking "what time is it" will now have VoiceControl speak the current time to you. It's possible other commands have been added as well. If you come across any, let us know.

iPod touch (and I believe iPhone) can now stay connected to Wi-Fi even when in sleep mode. This means background VoIP calls, push notifications, and other apps that require an active Wi-Fi connection can just keep working.

Instead of just hitting the globe key to cycle through languages on the virtual keyboard, you can now hold it down to get a popup showing all currently enabled international keyboards.

You're going to get tired of us saying "like the iPad" but remember when we told you spring's influx of iPad news would be important come summer's new iPhone news? You were warned for a reason. iPhone is getting iPad's Bluetooth keyboard support. Thank goodness for that.

Based on reports from Rogers/Fido users in Canada, iOS 4 adds the ability for Carrier Setting Updates to be pushed out over-the-air (OTA) to iPhones and installed on-device. (In previous versions iTunes would handle the update and sync it over).

Home Screen

SpringBoard, the app behind the Home Screen gets an iOS 3.2 for iPad-style update to support custom wallpaper. Yes, the default background in iOS 4 is water drops on gray, which is not default but included in the iPad's wallpaper gallery. Also like iPad, the Mac OS X reflective Dock (buh-bye grid) and translucent top bar have been brought over.

(If you get a new iPhone 4, or do a clean install of iOS 4, you'll also note Clock, Compass, Calculator, and Voice Memos have been moved to a Utilities folder by default -- more on Folders later).

In addition to the iPad wallpapers, Apple has also introduced a few new ones, all seemingly focused on livening up the home screen without being too visually distracting. Natural textures and muted patterns get an obvious focus here with stones, rocks, and textiles front and center.

(See all of them in our iOS 4 wallpaper gallery)

In addition to previous status icons, the top bar will now show a north-east pointing arrow to alert you that location-based services (GPS) are being used. (So you'll see this in Maps and when using navigation, location-based social networks or games, etc.) An orientation lock icon will also show if you've enabled the widget to lock your screen in portrait mode (see below).

The color bands indicators across the top of the screen that highlight running voice or data connections (green for Phone, red for Voice Memo, blue for tethering) get expanded. Red now serves double-duty to indicate a VoIP app (like Skype) is active in the background.

How the SpringBoard has been once again extended to visualize new, core-level OS changes is where things get more interesting...

First, and strangely least, the Spotlight Home Screen introduced in iPhone 3.0 now gets to look beyond on-device data and reach for the clouds. Literally. Well, insomuch as the cloud here is Google and Wikipedia, which are very welcome additions. (Hopefully Twitter will be added in as well at some point). Tapping either will launch you into Mobile Safari and the appropriate search result page.

While Apple's built-in apps (like iPod, Mail, etc.) have had background multitasking since 1.0. four years, many gripes, and stiffer Google Android competition than later, background multitasking comes to App Store apps. (At least for iPhone 4 and last year's iPhone 3GS).

Why no iPhone 3G? Apple abjectly refuses to put their name on an implementation where hardware constrains software -- see video recording last year -- and that means iPhone 3G isn't up to their multitasking standards.

As to how it works, instead of a traditional "leave full apps running in the background" approach, Apple instead chose to implement a more restricted but, they felt, better performing and power friendly solution involving 7 specific background API (application programming interfaces.)

Local notifications

In addition to the existing push notification service from Apple's servers, which provide sound, badges, and alert popups for everything from IM to game challenges, iOS 4 adds local notifications so something like an alarm-clock app could register an alert that would sit in the iPhone in the background until the proper time, then activate. That takes the online server out of the equation which is good for tasks that don't need additional information from the cloud, and so don't have to activate the radios.

Task completion

There's another API for task completion so that, for example, if you're uploading a picture to Twitter and leave the app, it can register a thread to keep uploading the picture in the background while you do something else. That means the entire app doesn't have to keep running, freeing up memory and lightening battery load, and even the thread will terminate when the upload is done.

Fast task switching and saved state

Fast task switching deals with the perceptive speed that multitasking offers. With previous versions of iOS, if you left an App Store app it would shut down completely. If you went back -- regardless if it was a second or a week or later -- it would usually restart not from where you left off but from the beginning. A few developers tried to add persistence on their own, saving your place when you came back as best as previous OS versions allowed, but most didn't -- especially games which was aggravating when phone calls pulled you unexpectedly out of them. Also, if you closed one app and went to another, you could theoretically be stuck swiping back or forth between 11 home screen pages.

Saved state is now built into iOS 4. If you switch out, Apps have their currents state saved to memory and if/when you go back, the app checks the memory save and resumes from that state. [Thanks Aaron]

To enable fast app switching, Apple's created a new UI mechanic. Now, when you double tap the home button, the screen turns translucent and slides up, allowing you to peek at the apps running "under the hood". (Technically frozen with state saved and threads registered with the background API).

Apps in the fast switcher UI are sorted in order of last usage. That means, if you're moving between a set of commonly used apps, they're most likely right next to each other and not screens and screens away. These two elements combine together to make launching apps perceptively much faster, even though the apps don't have to be running in the background consuming resources just for that convenience.

Positionally the fast task switcher apps take up the space traditionally reserved for the Dock, so while it's a tad confusing the concept of apps at the bottom of the screen being more permanent and easily accessible remains. Behaviorally, while they look like a secret dock, they function like the Home Screen itself in that you can swipe from right to left to scroll through a several 4-icon sets of multitasking apps.

Given even the iPhone 3GS has only 256MB of RAM, we assume Apple will discretely kill off the least-used app in the stack when things get tight. Whether or not that means the icon disappears from the multitasking UI we don't know, but worst case you just have to go to the home screen, re-launch it (hopefully from saved state) and all you notice is a slightly longer start up time. iPhone 4 is supposed to have 512MB of RAM which should allow for significantly more threads to run in background without slowdown or other problems.

iOS 4 helps users visualize what's going on when switching tasks by introducing a new, carousel-like animation. The new animation occurs when you switch between two apps either via the new, double-click-Home to trigger to launch the multitasking UI, or when one app calls another app (i.e. when you're in Contacts and you tap to send a contact an SMS).

Launching or leaving an app retains the same, zoom-based effect as always (though the wallpaper in iOS zooms slightly as well, like on the iPad).

YouTube link

Interlude: Task Killing

At the iOS 4 event, Steve Jobs likened task managers (in the multitasking, not to-do sense) to styluses -- if you need them there's something wrong. Initially this created confusion in iOS 4 when it was noted, if you hold your finger down on multitasking apps, they'd jiggle and bring up a delete icon that, if tapped, removed them.

It appears like there's a couple things going on. First, with built-in Apple apps, like Mail, if you "delete" it from the fast task switcher, you will still receive Mail (it doesn't kill the background thread that checks, sounds/vibrates, and updates the badge) but the app seems to do some sort of data cache refresh at times.

For App Store apps, if you "delete" them it does appear to force a reset when next you launch them, i.e. they won't resume from the previously saved state and their threads seem to be restarted. [Thanks Justin!]

Widgets

Just like to the left of the main home screen is a special Spotlight screen, to the left of the fast app switcher is a special widget dock containing an software version of the iPad's hardware orientation lock control (though it currently only locks in portrait mode). More over, there are three circular controls to skip back, play/pause, or skip forward any music (including streaming music) -- and rewind or fast forward if you hold them down. Lastly, whichever app is currently playing the music, be it iPod, iTunes (streaming podcasts, for example), or an App Store app (like Pandora or Slacker) is shown at the right so you can jump back to it and access further controls.

YouTube link

The presentation may not be as visually slick as Palm webOS' Card view (which looks like iPhone Safari's Page view) or Mac OS X Expose mode, but it keeps tens of millions of existing iPhone and iPod touch users grounded in the interface they're familiar with and that's what Apple is prioritizing.

Note: Previously you could assign the double-click home button action to trigger Phone Favorites, Camera, or Spotlight. On iPhone 3G under iOS those options remain. On iPhone 3GS under iOS, in early betas you could double-click-and-hold the home button to trigger Phone Favorites, but this function doesn't appear to have survive to the final release. Hopefully something will replace it and soon.

Background music, location, and VoIP

Speaking of streaming music, perhaps most famously, Apple is allowing apps to register three specific types of the threads for persistent backgrounding (they can just keep running until you close them). Again, this isn't the whole app running, just one thread from the app, so the idea is it won't slow down performance, use up memory, or drain battery to the same degree. These API are for streaming music, location, and VoIP (voice over IP).

This means you can listen to Pandora, Slacker, etc. while surfing the web. Navigon, TeleNav,TomTom, etc. can keep using the GPS and alert you to directions while you're on the phone, and to further save resources, non-critical location apps like FourSquare, Gowalla, Loopt, etc. can be alerted when you change cell towers. Fring, Skype, Line2, etc. can answer calls and receive messages when you're not in the app, making them more equal telephony citizens.

What's still missing are background API for timeline updates, so that IM, Twitter, RSS, etc. could update like Mail does and have new messages ready and waiting when you return to the app. Also, there's no API to let internet sessions like SSH, RDP/VNC remain active when you exit an app making it more onerous for network administrators and others to manage remote machines. Hopefully these can be added in future revisions.

There are over 200,000 apps in the App Store and likely a ton more by the time I finish writing the sentence. Literally. iPhone 1.0 had one Home Screen but with only the built-in apps available back then, it wasn't even a limitation. With WebApps, it grew to 9 pages for a 148 app limit. With iPhone 3.0 we were given 11 pages, for 180 apps viewable, but you could eventually install many more and use Spotlight as a way of finding and launching them. Organizing them still wasn't a real option.

Enter Folders. A Folder is simply a grouped icon that holds up to 12 other icons inside it. (And for those keeping count at home, the new math means a whopping 2160 apps can be kept available at once. Shudder).

The way it works is you tap a Folder icon and once again the Home Screen fades and splits open, this time below the Folder. Inside the split are all the apps contained in the group.

To create a Folder, you begin by tapping and holding an icon to put it in jiggly mode, just like you did before to delete or move it. Then, drag it over and drop it on top of another icon to create a Folder. (This works better when icons aren't at the right edge of the screen, as the move behavior seems to supersede the Folder behavior, causing the icon to wrap to the next line before you can drop on top of it.) Once created, iOS reads the apps' category data and tries to name the folder for you, but you can easily edit it and change it to anything you want.

To remove apps from a Folder, put them in jiggly mode inside the Folder and drag them out (or just delete them if you don't want the app anymore at all). You can also move them around within the Folder to customize their order.

Folders can be put in jiggly mode and moved as well, but not deleted (they can only be deleted by removing all the apps from within them, and which point they self-destruct for you). You can even move them to the Dock, which means you could have 48 apps readily available at any time for quick launching.

And while you still can't delete Apple's built-in apps, you can take the ones you're not using and hide them away inside a folder so they waste as little Home Screen space as possible (as Apple now does by default with the Utilities folder mentioned previously).

Again, not as visually exciting perhaps as Mac OS X's Stacks, but it keeps current iPhone users in a familiar interface while adding much-needed functionality.

YouTube link

The ability to manage Folders has also been added to iTunes 9.2, mirroring the creation, editing, and removal features found on-device.

Messages

Messages in iOS 4 gets the same built-in Spotlight search that Mail and other apps got with iPhone 3.0. It appears at the top of the main messages screen. (There's no search within an individual Messages thread). [@justin_horn]

Messages (finally) gets a character counter so you'll know when you're getting close to, or going past, the SMS limit (which would cause a second message to be sent). It kicks in after you've typed 50 characters or so. [@iMuggle]

iOS 4 will now put an exclamation badge on the Messages app as a way to inform you when an SMS text or MMS multimedia message fails to send.

There's also a new API to allow in-app SMS for developers who want to include the functionality in their own apps. While this might be similar to the iPhone 3.0 embedded email option, and whether or not it will let users reply to SMS without leaving an app, it doesn't seem as elegant a solution as a global background messaging system.

Calendar

Calendar removes two long-standing gripes and adds something pretty much invisible from the interface but awesome in terms of functionality.

First, you can now show all or hide all calendars or individually check/uncheck just the calendars you want to see.

Birthday calendars have also been added to the option, something that was previously only possible to see under certain setup conditions.

Lastly (and most excitingly), Apple has finally added Calendar access for developers. What this means is you may soon see apps where you can buy tickets for a local movie and have the show time automatically added to your Calendar.

Photos

Photos, at least for Mac users, gets the same iPhoto '09-based organizational features introduced with the iPad: Events, Faces, and Places.

If you have a Mac with iPhoto '09 and you've let it automatically file your photos by time stamp (Events), through facial-recognition algorithms (Faces), and via geo-location (Places). All these join the previous Albums view to form the bottom tab bar.

Landscape mode is also now supported in album and gallery views [@antonioj].

Previous betas included a Rotate function under the action button that would turn a photo 90 degrees, but this doesn't seem to have made it into the final. Hopefully it will return.

If you Email Photo, you now get the option of sending a small, medium, or large version (shrunken pixel dimensions and hence file size), or at actual size.

Lastly, developers have been given access to the photo and video library (not just the image picker as in previous OS versions).

Camera

Tap to focus, introduced in iPhone 3.0 for still photography, now gets expanded to video recording for the iPhone 3GS and iPhone 4.

Still photography maintains its leg up, however, via a new 5x digital zoom. When you tap the screen, a slider pops up allowing you to swipe to the right to increase magnification and swipe left to decrease.

With iPhone 4, there's an additional control to swap between the beefed up 5mp back-facing camera, and the all new front-facing VGA camera (if you want to take a self-portrait/profile picture). There's also an icon to show the new rear-mounted LED flash. This feature sounds like it's automatic for still but can be turned on and left on for night-time video shooting, but we'll have to wait and see when iPhone 4 ships.

Developers also get full access to and control of video playback and recording.

YouTube

You can now watch YouTube videos in portrait mode if you really want to. They'll still default in landscape, so you may have to rock the accelerometer back and forth to get them to switch.

Maps

A minor tweak, but the current location/current direction button changes from the previous crosshairs to a north-east pointer to match the new location services icon used in the title bar. (No iOS 3.2 for iPad-style terrain mode, at least not yet).

For developers, overlays can now be added to embedded maps to show extra data like routes or annotations.

Notes

When you first enter notes it looks unchanged from previous versions of the iPhone OS. However, there is now an Accounts button at the top left of the list page and tapping it takes you to a new screen where you can choose to view All Notes, just the notes on your iPhone, or just the notes that are synced via IMAP to your email account(s). Yes, that means over the air (OTA) notes sync is finally here -- with the caveat that Exchange doesn't seem supported yet.

(UI-wise this is similar to how you back out/left in Calendar or Contacts to toggle data sources.)

The way these show up in Mac OS X is via the built-in Mail.app client in the Notes tab.

On Gmail they show up as a generic label. In other IMAP clients, regardless of OS, they'll show up as generic IMAP folders.

iTunes Store

The iTunes store itself is the same, however, audio streaming from the app has taken a huge leap forward. Since iPhone OS 2.2 you've been able to tap the title of a podcast to begin streaming (rather than downloading) the audio, even in the background while using other apps, but it was sometimes hit or miss. It would drop out, it would time out, you couldn't really scrub through it, and if you left it for a while it would lose its place and start over.

In iOS 4 it's rock solid. You can scrub and it re-buffers and keeps playing flawlessly. You can stop it and come back hours or even days later -- even after using the iTunes app to search for other things or the iPod app to play different audio -- and it still knows where you left off and starts playing again instantly without missing a beat.

As mentioned previously in the multitasking section, when iTunes is using the background music streaming API (I'm assuming thats' what it's using) it gets the widget position in the fast task switcher interface, complete with widget controls.

Settings

This year, like every year, some of the more numerous and interesting changes Apple delivers in their new OS are tucked neatly away in the Settings app.

You can now choose to not only turn off 3G data or roaming data, but all cellular data.

At the iOS event, Apple made a big deal about user privacy when it came to location (like a shot at Google). That manifests here with far more granular controls over which apps are allowed to access your location data (GPS, Wi-Fi mapping, and cell tower triangulation) and the aforementioned north-east pointing arrow that shows up when any app has used your location in the last 24 hours.

Since double clicking the home button is now a hard-wired to launch the fast-task switcher for iPhone 3GS and iPhone 4, the Home Button setting is gone and replaced by direct access to Spotlight Search preferences.

Since iPhone 3G won't be getting multitasking those options remain under iOS 4 for that device.

Previously available only through an Enterprise profile, iOS 4 brings stronger, alphanumeric passcodes to all iPhone users. That means you're no longer stuck with only a 4 digit pin, but can now create longer passcodes with far greater variation. Of course, longer, more varied passcodes are more of a hassle to remember and enter, but that's the cost of good security.

As previously mentioned, Notes will now sync over IMAP and the settings for that appear here. First, all the way at the bottom, you can choose which account to use as the default for note sync.

Inside MobileMe, Gmail, or other IMAP accounts, you can choose whether or not to enable sync. Again, there's no support for Exchange ActiveSync accounts yet (including Gmail via GoogleSync).

When you tap into the Safari's URL bar in iOS 4 and start typing, Safari starts to do a "keyword search", i.e. display predictive results based on your bookmarks and history. Anything that contains the text you're inputing either in the URL or history is listed below the URL field so the moment you see what you want you can just tap it and go.

This makes it easier to find something if you don't remember the exact web page address or if you know you recently saw a site, and know what it was about, but don't remember where exactly it was. Just start typing a few words you do remember and let Safari do the heavy lifting. Highly convenient and certainly "awesome". [To misappropriate the term from Mozilla]

Also, welcome to iOS search options, Microsoft Bing.

Here's where you can turn on that new character count option.

The iPod app now has an overlay that shows you information about songs and podcasts. While functional it's not terribly attractive so it's nice to be able to toggle it off right here.

App Store

iPhone 2.0 brought us the iTunes App Store, iPhone 3.0 added in-app purchases, and now iOS raises the mercantile stakes once again with...

iAd will provide developers with an easy-as-Xcode way to place advertising in their apps, both paid and free. Apple is setting a high bar for their ads, however. No simple Google-style text, annoying punch-the-monkey, or jarring transition out of the app and into the browser, they claim to want great looking, highly interactive, emotionally compelling content that will connect with rather than alienate users. Served every 3 minutes. Yeah...

Functionally these are built in HTML5 (no Flash need apply) and seem to work as apps-within-apps. Tapping on a banner brings up a full-screen ad-as-webapp and examples shown included plenty of animated UI effects and content that ranged from videos to freebies like wallpaper, to free and paid apps you could download from within the ad (no trip to the App Store needed). An exit button is persistent at the top left so users can quit the add at any time.

Apple will be selling and serving the ads, so all we can do is hope they're unobtrusive and actually reach the quality levels presented. For paid apps that also try to include in-app iAds, that bar will rightly be very, very high.

Just like Mail can preview documents, Quick Look will allow developers to present the same functionality in their apps.

2000 hardware accelerated math APIs probably won't be seen by users, but there's not doubt we'll feel them in the games. Zoom. Zoom.

Again it looks like the iPhone is finally getting in iOS what the iPad got in 3.2 with the file/document transfer feature now exposed in iTunes sync.

Now all we need is an elegant way to share and wirelessly sync those documents across multiple devices and users. MobileMe 2.0, souped up iWork.com 2.0, where are you?

Phone

The biggest addition to the iOS 4 Phone app is iPhone 4 exclusive -- FaceTime. When connected to Wi-Fi and making a call to another iPhone 4 user, the Hold button gets replaced with a FaceTime video icon. (Where the hold option goes under these circumstances is as yet unknown.)

Tapping that initiates a FaceTime video call. During the FaceTime video call, the person you're calling fill the screen, your own camera input is boxed in the lower left corner (you can touch and drag it to move it around), and mute, hang up, and switch camera buttons line the bottom of the screen. (Switch camera toggles between the rear-facing and front-facing cameras on the iPhone 4).

Mail

Mail gets a unified inbox. Let's write that again -- Mail gets a unified inbox. For those with multiple email accounts whose previous iPhone experience involved tapping into and out of those boxes many, many times a day this is a hugely welcome addition.

As with Calendars, Notes, etc. you can tap a button on the top left, in this case Mailboxes, to back into a selection screen where you can then go into All Inboxes, a specific account's inbox (which is considered fast inbox switching), or into the complete folder and sub-folder system of a given account (how Mail has worked from iPhone 1.0 to iPhone 3.0).

Once inside, All Inboxes is visually indistinguishable from an account-specific inbox, it simply contains all of their messages.

What is distinguishable are the small carets (technically greater-than symbols) to the right of replies that indicate a message is part of a thread. A number, typically 2 or 3, accompanies the caret to indicate how many replies are in the thread.

Tapping on a message that's part of a thread doesn't take you to the message but rather to a second list-view, similar to the inbox itself, but containing only the messages from the thread. Tapping on one of them then takes you to the message. A thread view contains a small vertical bar at the top with the subject of the thread and time of the most recent reply. A button to the top left of the message that's part of the thread also contains the subject of the thread and lets you back out and see the thread again. The button then switches to contain the name of the inbox so you can back out again, leave the thread completely, and see all your messages.

So yes, the tap, tap, tap of inbox navigation persists, albeit shifted from moving into and out of inboxes to moving into and out of threaded messages.

Like iOS 3.2 for iPad, you'll be able to open email attachments in apps. Now there's no iWork (Numbers, Pages, Keynote) for iPhone yet, but plenty of apps should support it as they push out the iOS 4 compatible versions.

Great news for heavy ActiveSync users, iOS 4 supports multiple accounts. So, for example, you can now have your work Exchange server and home Google account both set up to push through ActiveSync (which is what Google Sync users behind the scenes) at the same time. Win. Win.

Also for Gmail users, the Delete button has no been properly renamed as Archive (since Google really doesn't want you deleting anything if they can possibly help it).

Lastly, in previous versions of the iPhone OS, when you wanted to abandon an email, you would hit Cancel and get options to Save (store the email in Drafts), Don't Save (trash the email), and Cancel (go back to writing the email). The naming of these options was likely too confusing so in iPhone OS they've been replaced with a big red Delete button (to trash the email), Save as Draft, and Cancel. And yes, you can still cancel a cancel. (iPad, by contrast, still has Save and Don't Save, but no Cancel since it's in a popover rather than full-screen menu and you can just tap away to cancel).

Safari

More iPad to iPhone cross-polination means we get search auto-complete in iOS. As you type, suggestions appear in a list view below. And as with the iPad, while Google and Yahoo! branding remain in the search boxes (along with Bing now as well), they no longer get brand advertising on the keyboard -- it simply remains labeled Search now regardless of which engine is set and default.

While HTML5 video would work under iPhone 3.1.3, it would launch the full screen QuickTime player to do so. Under iOS, it seems to play in-line as well [MobileGeekdom], like it does on the iPad.

If history is any indicator, Apple will likely also integrate whatever advancements WebKit and the Nitro JavaScript engine make between now and release this summer. However, there's no sign of Safari 5 desktop's key new features -- reader (think built-in Instapaper) and extensions.

iPod

When you have a song playing in the iPod app and you tap the album art, in addition to all the previous controls that popped up, you now get a dark overlay with white text giving you the info metadata of the song or podcast. This is another iPad bring-over, though not the most attractive one by a long shot. (Remember, it can be turned off in Settings).

Album art has been added to album views, jazzing up the track lists.

And in yet another iPad-like update, on-the-go playlists are dead, long live... just regular old playlists. You can add them via an item in the playlists list, at which point you get a popup that asks you for a name. Next, you tap on any songs you want to add, and when you're done, you have a new playlist. If you're not happy with it, or any playlist, just swipe to bring up the usual red Delete button and annihilate it.

Contacts

When you sync contacts from more than one source (i.e. Exchange and MobileMe, on-device and Google Sync, etc.), and there are duplicates, rather than showing the same contact twice iOS 4 will instead create a single, linked contact. This works on any iOS 4 device, including iPhone 4, iPhone 3GS, recent iPod touch, etc.

If you look at a linked contact, the header will show Unified Info at the top so you know it's linked. At the very bottom of the contact it will show you the source of the links (i.e MobileMe, Google). Tapping on the source lets you see the original, non-unfied info from just that source.

If you don't like the idea of your contacts being linked, you can tap edit and hit Unlink. If iOS 4 missed linking a contact that ought be linked, tap edit, scroll down to the bottom, tap Link Contact and choose the contact you want linked.

Game Center (Preview)

Game Center is Apple's entry into the social gaming network space (think Xbox Live or Playstation Network for iOS devices). With Game Center you'll be able to invite friends to play, use matchmaking to challenge other players, gain achievements, and have your scores displayed on a leader board.

Game Center won't launch with iOS this summer, but is scheduled for release "later" this year.

iBooks

Though not a built-in app (you'll need to go get it from the App Store when it becomes available), as part of iOS Apple announced they were bringing iBooks to the iPhone.

Apple has announced new features, including notes and bookmarks, and that those along with highlights will automatically be synced across all the iOS devices logged into your iTunes accounts. (So you can have the same book, at the same place, with the same annotations on your iPhone, iPod touch, and iPad).

Also, iBooks will be able to add PDFs to a second book shelf and open them in the same iBooks interface.

Due to the fracture and regionalism in books, it's going to take Apple a while to get deals in place with all publishers in all areas which means most countries won't have paid content at first, only public domain books from the Project Gutenberg library.

Accessibility

Apple really doesn't get enough credit for the outstanding accessibility features they build into their OS, both desktop and mobile. iOS 4 continues to lead the industry. VoiceOver supports 21 languages to read out loud whatever your finger touches on the screen, and a "rotor" gesture lets you temporarily change languages now on the fly.

Bluetooth support has been extended to more than 30 braille devices with tables for more than 25 languages.

Touch Typing lets you run your finger across the keyboard, hear the letter you're currently over, and release your finger to type it.

The basic rotor has been made visible so sighted users can see it in action, and you can now add custom settings to move through content.

iOS 4 pricing and availability

Apple has announced that iOS 4 will be coming to iPhone and iPod touch on June 21, and iPad later this fall. In a huge departure from previous years, Apple is also making it a free update to all users, iPhone and iPod touch alike. (If you have a compatible device, see directly below).

iOS 4 device compatibility

Before we begin it's important to note that not all iOS 4 features will be available for all iOS devices.

• iPhone 4 (2010): All features
• iPad (2010): Coming this fall
• iPhone 3GS and iPod touch G3 (2009): No features requiring iPhone 4-type hardware (i.e. FaceTime)
• iPhone 3G and iPod touch G2 (2008): No multitasking, custom wallpaper, and Bluetooth keyboard support.
• iPhone 2G and iPod touch G1 (2007): not compatible/no update

Yes, the original iPhone 2G and iPod touch G1 don't look to be getting iOS 4 at all -- Apple considers them outdated. Second generation iPhone 3G and iPod touch G2 are getting the update but no multitasking -- Apple doesn't consider them powerful enough (similar to video recording last year). And it should go without saying only iPhone 4 (and perhaps a forth generation iPod touch when it ships this fall) will be able to use hardware specific features like the Retina Display resolution or the front-facing camera.

Additionally, Apple's own iMovie for iPhone will only run on iPhone 4 -- apparently it needs the A4 chipset -- so there might be other apps that go 2010-only. Legacy, right?

Conclusion

Apple is again rounding out their offering with iOS 4, which is the sign of the maturity of the platform. Since they've stated several times now that they're using the iPhone to "educate" users about multitouch interfaces, they're going to continue keeping changes evolutionary for now, and the UI broadly consistent across devices. There won't be any huge, revolutionary changes again until they have to, and they don't have to yet. Restraint can be a virtue.

Some functionality is still not present, like non-interuptive notifications, widgets beyond the limited fast task switcher UI, wireless sync/sharing, less painful file round-tripping, etc. but Apple is no doubt working on this the way they worked on copy and paste and multitasking. The question is how and when, not if. After all, it's only 9 or 10 months until the iOS 5 sneak preview in spring 2011, right?

But this is not a review — our full rundown of the pros and cons will come after the official launch, when we've had a chance to spend some quality time with the final version on the new iPhone 4 hardware.

Congratulations to the iOS team at Apple, phenomenal work. Again.

[Thanks to everyone who contributed screenshots and descriptions for this walkthrough. If you noticed we missed anything, drop us a note in the comments and we'll update as needed.]

During yesterday's WWDC 2010 keynote, Steve Jobs announced that iOS 4 will be a FREE update for all devices, and the iPhone and iPod touch version will be released on June 21 (iPad version is still slated for fall). The main features include multitasking, folders, spellcheck, unified inbox with threaded messages, iBooks, Bluetooth keyboard support, and custom wallpaper. (Be sure to check out our iOS 4 preview for more details!)

iOS 4 is available for the iPhone 3G, iPhone 3GS, iPhone 4, and the 2nd and 3rd-generation iPod touch. On the other hand, the original iPhone 2G and 1st-generation iPod touch will not be able to upgrade to iOS 4, and as with every big software release, some devices will not get all the new features.

Multitasking, custom wallpaper, and Bluetooth keyboard support are only available for iPhone 4, iPhone 3GS, and the 3rd-generation iPod touch.

In the past, iPod touch users had to purchase big software releases for $9.99. Not this year. iOS 4 is a FREE upgrade for iPod touch. This is huge news for our iPod touch wielding users.

If you use an iPhone 3G or 2nd-generation iPod touch, do any of these missing features entice you to upgrade? If so, do you plan to go big and upgrade to iPhone 4; or do you upgrade to the iPhone 3GS at the new amazingly low price of $99? iPod touch users, are you thrilled to be able to upgrade for free, or do you believe it should've been free all along?

Let us know in the comments below!

[Apple iOS 4 page]