iPhone Dev-Team will release an update to its iPhone unlock software Ultrasnow to unlock iPhone 4 / 3GS running iOS 5.1. This is a good news for some iPhone users relying on the iPhone unlock, the wait will be over.
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).
Ultrasn0w 1.2.6 Unlock for iPhone 4 / 3GS unlock on 5.1 Compatible with the basebands:
Unfortunely, it seems like iPhone 4 baseband 4.11.08 will not be unlocked with the Ultrasn0w 1.2.6. A new version of Redsnow was released by the Dev-team to jailbreak the iPhone, iPod touch and iPad A4 devices running on iOS 5.1
If you still have questions regarding iPhone 4 / 3GS Unlock on iOS 5.1 With Ultrasn0w 1.2.6 Coming Soon, you can leave us a comment