[iMore.com]

The iOS 9.1 public beta is a way to try out the first point release update for Apple's latest mobile operating system. But since the release version just came out, you might be tempted to go back and give it a whirl. And that's fine. You can always try iOS 9.1 again later, or wait for the final release in a couple months. What's more, downgrading is easy, all you need is iTunes on your Mac or Windows PC, and to follow the steps below!

Full story from the iMore Blog...