I'm not quite sure what's going on, but every once in awhile, when I receive a notification, my phone starts going crazy. It'll start to make the notification sound, but then it'll cut off and the screen will start to flicker. Then the screen will turn off and the rest of the sound will play about 5-7 seconds after the first part of it is played. I'm not sure what's going on. Other than this, the phone is completely perfect, no scratches or dents. It only happens about once a week.