A new method to downgrade iPhone 3G 06.15.00 Baseband to 05.13.xx is available now.It will 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.This method currently only works with the iPhone 3G with bootloader 5.8.The procedure is straightforward.It is also highly recommend you to backup everything on your device before following the procedure.
Here’s another good news for the iPhone users specially for those who suffered from the new unlockable baseband 6.15.00 on iPhone 3GS and 3G after ultrasn0w 1.2.Most of the unlockers who unlocked their devices with ultrasn0w 1.2 can’t restore to any stock firmware above 4.1, it only can be restored to a custom firmware, moreover, ultrasn0w 1.2 caused a loss of GPS.MuscleNerd has confirmed it.
To flash the iPad 06.15 baseband on iPhone 3G(S) on iOS 4.2.1, iPhone Dev Team has just released new Redsn0w 0.9.6 b5 that fetches the baseband files directly from Apple.Redsn0w b5 can jailbreak and update iPhone 3GS & 3G baseband to 06.15.00 so that it can be unlocked using the newly released Ultrasn0w 1.2.
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