- Oct 24, 2010
I have an old iPhone 3G (ancient, right?) running iOS 4.2.1 jailbroken and unlocked on baseband 6.15.00. A 3G on 4.2.1, as you might have heard, is a freaking DINOSAUR. Is there a way to downgrade to iOS 3.1.3 without getting stuck in some crazy loop because of the upgraded baseband?