Today the iPhone Dev-team has released new version of Redsn0w to bring jailbreak for non-A5 devices (iPhone 4, 3G, iPad 1, iPod touch 4G, 3G). In case that you’re one of those who rely on unlock their iPhone 4 or iPhone 3GS using Ultrasn0w, we have good news for you. iPhone Dev-team announced that they will release new version of Ultrasn0w (Ultrasn0w 1.2.6) to unlock iPhone 4 and iPhone 3GS on 5.1.
iPhone Dev-team blog (Important notes):
If you use ultrasn0w for your carrier unlock, be sure to use a custom IPSW to get to 5.1 first! Don’t ever restore to a stock Apple IPSW! Use redsn0w’s “Custom IPSW” button to create a NO_BB_* version of the 5.1 IPSW and restore to that instead of the stock one. (That option is available only to 3GS and iPhone4-GSM owners.) ultrasn0w itself will be updated for 5.1 in the next few days (same baseband support, not 5.1’s baseband).
To make it clear ultrasn0w 1.2.6 won’t be a new unlock for higher basebands, ultrasn0w 1.2.6 will bring compatibility with iOS 5.1 to unlock the already unlockable basebands.
Ultrasn0w 1.2.6 to unlock iPhone 4 / iPhone 3GS on 5.1 for the below basebands:
According to iPhone Dev-team, ultrasn0w 1.2.6 will be released within the few coming days. You will be able to download ultrasn0w 1.2.6 to unlock your iPhone 4 or iPhone 3GS from Cydia after jailbreaking on 5.1 using custom firmware (MUST be custom firmware), stay tuned.