10 Things to Know About the iPhone 5 iOS 9.1 Update

You Can't Downgrade to iOS 9.0.2

Apple's closed up the iOS 9.0.2 downgrade. If you move to the iOS 9.1 update, you're stuck there unless you're alright with using a jailbreak.

You can drop back to iOS 8 if you jailbreak your iPhone 5. It's an involved process but the option is there if you need it.