How to downgrade the iPhone 4 to iOS 4/5/6 - YouTube
Developer creates a way to downgrade the iPad 2 and iPhone 4s to iOS 6.1.3
[request] [question] unable to activate iPhone 4 (model CDMA 2012) after downgrading to iOS 6.1.3 from 7.1.2 using GeekGrade ipsw. Tried different networks and iTunes but no use.. can somebody please guide me or tell me how to activate it : r ...