UltraSn0w Unlock for iOS 4.3.1 is Almost Ready

iPhone Dev-Team member MuscleNerd, has posted an image of an unlocked iPhone’s screen on T-Mobile with iOS 4.3.1. The unlock 4.3.1 will be compatible with iPhone 4 and iPhone 3GS. The new version of ultrasn0w should hit Cydia very soon. This unlock does not work on any new basebands, it is simply an update for use on 4.3.1.

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for those at 05.14, 05.15 or 05.16 I really don’t see an unlock coming. Rather, it’ll be: update to 06.15, then down to 05.13

(because the downgrade from 06.15 goal is much higher priority than explicit 05.14, 05.15, or 05.16 unlock. Achieves same.)

You need to have a jailbroken iOS device in order for iOS 4.3.1 unlock to work. You can jailbreak your device using Redsn0w 0.9.6 RC9