I was at work today and my phone was functioning perfectly, then I went to respond to a text and I couldn't unlock my phone. Nothing was functioning, home, search keys etc. I then turned off my phone and put it in the truck and an hour later I came back and it was working fine. 30 minutes after that it was back to it's unresponsive self. The physical buttons still seem to be working, but the touchscreen and capacitive buttons are not. Any solutions?