The screen kept locking up at random times. I got fed up with it happening once every day and decided to take it into the Genius bar and see what they had to say. The guy asked a few questions and told me that they will just switch it out. They did and here are a few things I noticed after syncing back up: 1. The volume is quite a bit louder. 2. The vibrate setting is much stronger. 3. Transitioning from one app to another seems smoother and doesn't take as long to load. 4. This is probably a problem with my specific phone but the volume button on the side feels different; specifically the "volume down" button. It feels shallow and not as responsive. Just wanted to share.