Few days ago, we have reported you that iPhone Dev-Team has just released the tethered iOS 5.1 Jailbreak with Redsn0w 0.9.10b6 for the older generation device, and the users with iPhone 4 / 3GS, iPad and iPod Touch can upgrade their devices to the latest iOS 5.1 with the tethered jailbreak option, and can preserve their iPhone basebands for the Ultrasn0w unlock on iOS 5.1. However, in the quick update to the Redsn0w, iPhone Dev-Team mentions that they will soon release the new Ultrasn0w to unlock iPhone 4 and iPhone 3GS on iOS 5.1, but until now, they have not yet released any update to their Ultrasn0w tweak with the compatibility for iOS 5.1.
Ultrasn0w 5.1
Many users have upgraded their devices to the tethered iOS 5.1 jailbreak to test the newer tweaks, and applications on their devices while preserving their basebands to unlock their device later with Ultrasn0w, but now it appears that developers over there just forget to push a new update to their unlocking tool, and therefore, the other developers out there got chance to introduce something new in the market to bring the Ultrasn0w unlock on iOS 5.1 with their little reverse engineered tweak. “Ultrasn0w Fixer,” the older tweak is just released back in the Cydia with the ability to fix the Ultrasn0w on iOS 5.1 to unlock the supported iPhone 4 and iPhone 3GS basebands on the iOS 5.1.

So now we recommend the installation of this “Ultrasn0w Fixer” to the users, who have been waiting for the official Ultrasn0w update from the iPhone Dev Team to unlock their device on iOS 5.1 with Ultrasn0w. The users with locked iPhone 4 baseband can unlock their device with the new Ultrasn0w Fixer installation on their device. The new tweak is not available on the public Cydia’s repository like the previous release of the update, instead this time you have to install the tweak directly from the developers’ private repository.

To install the Ultrasn0w Fixer to unlock iOS 5.1 you have add this repository in your Cydia, and then do a quick search for the “UltraSn0w Fixer”. Add this repository in your Cydia to get the tweak on your device: “http://repo.iparelhos.com”

Let, me clear you! The tweak doesn’t support any new baseband update unlock, and can unlock only those baseband that was already supported by the official ultrasn0w. The tweak simply fixes the Ultrasn0w to make it work on the iOS 5.1.