How to unlock your iPhone on iOS 4.3.2 via Ultrasn0w (Mac only)

Ultrasn0w has been updated by the Dev Team to include support for unlocking iOS 4.3.2. So if you've been holding off on upgrading and waiting patiently (or impatiently) for an unlock, you can now have your cake and eat it too! As always, you'll need to be running a compatible baseband version (meaning don't upgrade to 4.3.2 via iTunes!) Hit the jump for a walk-through!

What you need

  • AT&T/GSM iPhone running a preserved baseband (refer below for compatibility list)
  • PwnageTool - download for Mac
  • Ultrasn0w (downloaded via Cydia)

Compatible Basebands

  • 01.59.00
  • 04.26.08
  • 05.11.07
  • 05.12.01
  • 05.13.04
  • 06.15.00

Not sure? We have a tip on how to find out what iPhone baseband you're running. Check it out, and if yours is listed, you are okay to move on. If it isn't, please do not attempt an unlock at this time. As you can see in the screen above, mine is not compatible. I have AT&T so I have not been concerned about preserving my baseband.

Jailbreak with PwnageTool

If you have already done this, skip ahead to the next section. If you haven't, you will need to download PwnageTool for Mac as well as the iOS 4.3.2 IPSW file for iPhone 4 or iPhone 3GS

Make sure you save the IPSW file somewhere you can easily navigate to. I always save mine on my desktop for example.

Then simply follow the instructions on screen to jailbreak via PwnageTool. Once you're done with that and Cydia is installed, you're ready to move on. (Not sure what that is? Check out our how to use Cydia, the Jailbreak store tip.

Unlock your iPhone with Ultrasn0w

First you will need to add the repo for Ultrasn0w. Simply tap Manage and then Sources in Cydia. Tap edit and then the "+" sign to add the Ultrasn0w repository which is

Next search for Ultrasn0w in Cydia under the search tab. Ultrasn0w 1.2.2 should now pop up. Simply install it and reboot your device. You should now have an unlocked iPhone running on iOS 4.3.2!

If you run into any issues or have any questions, let us know in the comments or check out our official TiPb jailbreak and unlock forums for answers to many commonly asked questions!

Have something to say about this story? Leave a comment! Need help with something else? Ask in our forums!

Allyson Kazmucha

Senior editor for iMore. I can take apart an iPhone in less than 6 minutes. I also like coffee and Harry Potter more than anyone really should.

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Reader comments

How to unlock your iPhone on iOS 4.3.2 via Ultrasn0w (Mac only)


one of these days an ultrasn0w will be released for a USEFUL i4 baseband like 3.10.1, even after months and months and MONTHS of waiting (for something free that is well above me tech knowledge of doing myself) im still rooting for them, word is they gave up a long time ago tho, apple may have finally out brained and braun'ed the MuscleNerd, but who shot the Sherif?

oh now I can, my question guys and gals, is if I am not on any of the above mentioned modem firmware, does that mean I am SOL?

If I can jailbreak my 3GS with this, is there a way to use my phone as a wireless hot spot for laptop?