Unlock with Ultrasn0w on 5.1.1 with Ultrasn0w 5.1.1 Fixer (DEB)
For our readers who have updated to 5.1.1 using Sn0wbreeze 2.9.5, you may have noticed that even with a compatible baseband, Ultrasn0w does not work on 5.1.1. Until the iPhone-Dev Team releases an update to Ultrasn0w, you will have to install the Ultrasn0w 5.1.1 Fixer in order to get the unlock working. For your convenience, we have bundled the latest Ultrasn0w, MobileSubstrate and the Ultrasn0w 5.1.1 fixer into a single download.
The easiest way to install these deb files is to simply transfer the files to any folder on your phone using iFunBox, iExplorer or SSH and then installing the deb files using iFile on the device itself. Remember that this will only work for those who have preserved their Ultrasn0w compatible basebands(04.26.08 - 05.11.07 - 05.12.01 - 05.13.04 - 01.59.00).
Step 1: Download the Ultrasn0w 5.1.1 Fixer pack Step 2: Transfer all 3 included deb files to any folder on your device(make it something easy to remember like var/mobile/Documents). Step 3: On the device, open iFile and navigate to the folder where you copied the deb files to. Step 4: Install each of the deb files in this order: MobileSubstrate, Ultrasn0w, Ultrasn0w Fixer Step 5: Reboot your device and you should now be unlocked!