My daughter is on her 3rd droid within just a couple of weeks. First it would drop calls and they said sensor was not working. Sent new phone - now the screen will not wake up when ending a call. The only way to get a screen is to slide open the key board. They are sending 4th phone- store says they have never heard of this problem. I also have a droid- with no problem. What gives. Store says it can not be fixed.