10 Things to Know About the iPhone 6s iOS 9.1 Update

You Can't Downgrade to iOS 9.0.2

Apple's closed up the loophole and the iOS 9.0.2 downgrade is no longer available to iPhone, iPad and iPod touch users on iOS 9.1.

If you download the iOS 9.1 update, you'll be stuck on it until Apple rolls out another iOS update for the iPhone 6s.