It was only a few days ago that we brought you the exciting news that iPhone Dev Team and their rock star lead MuscleNerd had been working covertly on a way to allow users to downgrade the baseband on their iPhone 3G and 3GS from 06.15.00 to a prior one with full unlock and GPS support. This may not be something which some of you actually require, but for those unfortunate ones who had to update to the iPad baseband to get an unlock last year, it is certainly a nice welcome, especially with the launch of Apple's new Maps service in iOS 6 that makes extensive use of the device’s GPS capabilities.
The following method will help you downgrade the baseband of iPhone 3G from 06.15.00 to 5.13.xx, which is unlockable using Ultrasn0w. This method will also enable you to restore your device on the official stock firmware using iTunes which was otherwise not possible on iPad’s 06.15.00 baseband.
