When I'm using my phone the screen gets all funky with colors and re-starts on its own. Just wandering if the phone is starting to go out! It works fine afterwards but I have noticed lately that I have to power off at least once a day for this not to occur. Is my phone on its way out? or is it normal? It hasn't gotten wet, and I haven't dropped it, but it has been very cold lately. Does that effect it?