Ultrasn0w 1.2.7 to unlock iOS 5.1.1 on iPhone 4, 3GS is now available. Since the release of Redsn0w’s iOS untethered jailbreak, 0.9.12b1, we have been hearing rumors that Ultrasn0w 1.2.7 will come up with a new version to unlock iOS 5.1.1. Now we know for sure that this rumor is true

Just a few minutes ago, iPhone Dev-team released Ultrasn0w 1.2.7 which will enable users to unlock the following basebands.

For those who have been living under a rather large rock lately, let me tell you a little bit about Ultrasn0w. Ultrasn0w is a service that that allows iPhone users to unlock their iPhone devices so it can practically work on any carrier’s network. Ultrasn0w was originally started by iPhone Dev team. The installation steps are quite simple and you only have to go through the steps once unless an update is released by the Cydia store.