As most of you know that iPhone Dev-team is the only involved team that working on iPhone 4S unlock expilot.
This month iPhone Dev-team, Chronic Dev-team and Pod2g were very busy to finish the shinny iPhone 4S and Pad 2 untethered 5.0.1 jailbreak. Now - iPhone Dev-team has nothing to do except iPhone 4S unlock.
The iPhone Dev-team has dumped the baseband bootrom, which means that iPhone 4S unlocking is very promising. According to MuscleNerd, who are interested on iPhone 4S unlock, should stay on iOS 5.0.
Unlock for iPhone 4S (with ultrasn0w) will be available only for iPhone 4S, as iPhone 4 have compicated basebands.
Unlock iPhone 4S Release Date ?
For now, we haven't official date for releasing iPhone 4S unlock with ultrasn0w, but we can confirm that iPhone Dev-team is working hard to iPhone 4S unlock. Just follow UnlockBoot and be first who have Unlocked iPhone 4S using Ultrasn0w. We hope that soon we have post with full description and tutorial