My phone rang and right when I said "Hello" the entire phone locked up on me. I had no control to do anything. So I powered the phone off then restarted it. The reboot process too forever to come back up so I then did a battery pull and rebooted the phone again and 10 minutes later it was back working fine again! What could be causing this to happen? Just prior to me getting that phone call, I had downloaded an app from the App store. Perhaps I have to many apps so I deleted some that I don't use. Everything seems fine now but it was weird!