10 Things to Know About the iPhone 5s iOS 9.2.1 Update

You Can No Longer Downgrade to iOS 9.2

If you decide that iOS 9.2.1 is unbearable that's too bad because you're stuck with it. 

Apple is no longer signing off on iOS 9.2 which means you can no longer use a loophole to drop back to the iPhone 5s iOS 9.2 update. 

The company typically stops signing off one to two weeks after an update's release, something to keep in mind for future updates.