re: iOS 10 Dev Beta 2 is Live
You'll need to boot into recovery mode and force a restore and update using iTunes. This iMore article details the process. Although it was written for a previous version of iOS (9.3 beta to 9.2, to be exact) the process should be the same.
http://m.imore.com/how-downgrade-ios-93-back-ios-92
I have this loaded on an old device, what's the procedure to roll back to iOS9?
You'll need to boot into recovery mode and force a restore and update using iTunes. This iMore article details the process. Although it was written for a previous version of iOS (9.3 beta to 9.2, to be exact) the process should be the same.
http://m.imore.com/how-downgrade-ios-93-back-ios-92