Fixes for iOS 9.2.1 Problems
If you do see an iOS 9.2.1 problem on your iPhone 5s, there's no need to panic or rush to an Apple Store to visit with a genius. There's a good chance you'll be able to fix the problem at home.
The first place to look is our list of fixes for common iOS 9.2.1 problems. The list includes fixes for battery drain issues, problems with Wi-Fi and more. It's a great place to start if you run into an issue you just can't seem to fix.
If you haven't installed iOS 9.2.1 yet, you'll still want to take a look at the list and absorb as many fixes as you can. That way, you'll be prepared if you do happen to run into a problem on your iPhone 5s.
If you can't find a fix there, take a look at our list of additional resources.