Untethered Jailbreak for iOS 4.2.1 Coming Along

The iPhone Dev Team has been hard at work, trying to give us an untethered jailbreak for iOS 4.2.1. There have been many hurdles, but it sounds like we’re getting closer.

The iPhone Dev Team posted another beta of Redsn0w 0.9.7. Beta 4 gets rid of the “usbmux” step that was required in earlier betas. The team feels this is the last big code change, and they should be able to start beta testing the Windows version, and support for other devices.

Here’s the latest update from the iPhone Dev Team:

Update #4: The fourth beta is now available (testers ONLY please!). Starting with this version, redsn0w no longer requires you to install and run a separate program for the usbmux (this was a non-trivial procedure for many).   It’s okay to keep that program running if you normally use it for ssh anyway.  We also think we’ve fixed a race condition in the GUI that was causing redsn0w to crash during the “Preparing JB Monte Files” step. Nothing at all has changed on the iPhone side (where the main issues are still just Bluetooth and Skype).

If you want to try this, there are some restrictions. You have to have your iDevice on iOS 4.2.1 already jailbroken, and with SHSH blobs saved in Cydia for iOS 4.2 beta3. Also, you must have copies for iOS 4.2.1 and iOS 4.2 beta3 firmwares on your computer. If you have all this, and want to try it out, here’s the download link:

redsn0w_0.9.7b4 (OS X)

Remember, there are still some issues, like Bluetooth and Skype not working. Also, if you have used a previous beta, you must do a fresh restore in iTunes before trying this one. This also means, if you require your iPhone to be unlocked, STAY AWAY! A fresh restore in iTunes updates your baseband, making it not compatible with ultrasn0w.

If any of you you are able to test it out, come back and let us know how it went!

[iPhone Dev Team blog]