Want to update your device to Apple’s latest iOS 5? But fearing to lose the unlock status of your iPhone 4 & iPhone 3GS due to baseband update. No need to worry more, iPhone Dev team has just confirmed the compatibility update of iOS 5 to their most popular unlock software “ultrasn0w”. MuscleNerd of iPhone Dev Team has announced that they will release the update of ultrasn0w after the scheduled update of MobileSubstrate update to work on iOS 5.
As ususal the ultrasn0w update only carries the iOS 5 compatibilty and works for only these mentioned: 1.59.00, 04.26.08, 05.11.07, 05.12.01, 05.13.04, and 06.15.00 basebands. If you have one of this baseband on your device then you will get unlock for your device tomorrow after the release of MobileSubstrate update. But if you are using Gevey SIM and wants to update your device to new iOS 5, all you have to preserve your baseband with latest released Redsn0w 0.9.9b5 for MacOS to get unlock on iOS 5 with Gevey SIM interposer.
In order to use UltraSn0w for iOS 5, you will first need to upgrade to iOS 5 while preserving the baseband. This can be done using the latest version of RedSn0w.