How to Downgrade iOS 9 Beta to iOS 8
iOS 9 may be exciting with new features and refinements, but running beta software on a primary iPhone or iPad is rarely recommended, as the experience is less than optimal at the moment. For
those who installed iOS 9 beta only to discover it’s current state is a bit of a buggy battery drain, the best solution is to downgrade back to a stable iOS 8 release. Reverting from iOS 9 is fairly easy to do, though it’s a bit more technical than your average iOS restore process, if you follow along you’ll be back on 8 in a few minutes.