The iOS 4.2.1 untethered Jailbreak via redsn0w beta we posted about the other day is now good to go for testers. Again, this is not an untethered Jailbreak release it's just a beta that's buggy but, with testers' help and feedback, should get better and quick. Quoth the Dev Team:

  • This is a beta tester program. It’s not a general release! Things can go very wrong, so please don’t even consider testing if you have pictures or other media on your device that you haven’t backed up!
  • For the same reason, please don’t participate if you rely on the ultrasn0w carrier unlock. Wait for the final version!
  • Until we fix some sandbox issues with bluetooth, the bluetooth functionality is disabled.
  • This very first beta1 is limited to iPhone4, iPad, and iPod touch 4G.
  • Cydia must have your 4.2b3 SHSH blobs saved on file. (As we approach a general release, we’ll provide a way to let you use locally saved hashes too).
  • You must already have the usbmuxd software installed and running on your Mac (this requirement will eventually go away too). The correct invocation of the relay is just as that page says: “./ -t 22:2222”. If the relay isn’t installed or running correctly by the time the redsn0w ramdisk has started, you’ll need to restore to stock FW again to try it again. Please test it beforehand to save yourself some time!
  • Please leave all feedback in the comments below (we really need your feedback to help develop it into a stable release!)

If the above scares or confuses you, stay away. If it excites and entices you, go grab the redsn0w beta test release via the link below, and let us know how it works for you!

Update: Please use extreme caution when using betas of anything. This is no exception. It seems the beta of redsn0w is causing a lot of users some serious grief. Us here at TiPb recommend staying on iOS 4.1 if you can or sticking with the tethered version for now. Here's a list of issues many users have been experiencing with the beta -

  • Bluetooth is disabled
  • iPod player not working on iPhone 4 and iPad
  • Application switcher causing the springboard to crash
  • YouTube is not working for many
  • Videos in your camera roll may not play at all
  • AirPlay not compatible
  • Some app store apps are crashing or not working at all

The above issues are pretty serious and exactly why the Dev Team has advised that general users stay away from this beta. It's for testers, not the general public. So unless you are using it for testing purposes, it's best to stay away. If you expect a fully functional jailbreak with no issues, this isn't it.

[iPhone Dev-Team]