Ultrasn0w 1.2.4 available now software unlock on iOS5
The iPhone-Dev team has released the updated version of Ultrasn0w 1.2.4. This software unlock for iOS5 is for users with unofficial carriers who have an unlockable baseband and have upgraded to ios5 with a preserved baseband. Simply follow our tutorial on how to create a custom iOS5 firmware with Redsn0w and then jailbreak iOS5 and install Ultrasn0w 1.2.4.
This update is ONLY to add support for iOS5, it does not add support for any new basebands. The supported basebands for the iPhone 3G and 3GS are 04.26.08, 05.11.07, 05.12.01, 05.13.04, and 06.15.00. The baseband supported for the iPhone4 is 01.59.00. If you do not have one of these basebands you cannot unlock, however if you have an iPhone4 you can unlock with the Gevey Ultra SIM on iOS5 as long as you preserve your baseband updating to iOS5.