iPhone Dev-Team Updates UltraSn0w Unlock to Support iOS 5.0.1

Like we said before, the iPhone Dev-Team has released UltraSn0w 1.25 which brings iOS 5.0.1 support to the unlock for older basebands.

iPhone Dev Team's iPhone 4, 3G, and 3GS software unlock, now with added PwnApple. Compatible with iPhone 4 baseband 01.59.00 and iPhone 3G/3GS basebands 04.26.08, 05.11.07, 05.12.01, 05.13.04 and 06.15.00! Thanks to @sherif_hashim and @Oranav for contributing baseband crashes

UltraSn0w 1.2.5 is now available in Cydia. How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

If you are on one of the supported basebands and wish to update to iOS 5.0.1 you will need to do so with a custom ipsw that doesn't update your baseband.  How to Jailbreak Your iPhone Without Updating the Baseband [5.0.1]