If you have an iPhone 5s, there is a good chance that you have experienced a blue screen of death. This is a problem that can occur when your phone tries to start up but fails. The blue screen of death usually appears as a message that says “This device has had an unexpected event and is not working correctly.” There are several ways to fix this problem. One way is to try resetting your phone. Another way is to replace the battery. If either of these methods does not work, then you may need to go to your Apple store and purchase a new iPhone 5s.
