This thing is driving me nuts! In the last week it has decided that making calls is no longer it primary function. When I dial out upon touching the send button the screen goes totaly black and will not function at all. Nothing I do will reactivate the screen. No way to hang up or select any other numbers like when calling in to a 800 line that requires you to select options. I can't mute, turn on the speaker phone, or hang up! The only time the screen will come back is when the person I have called hangs up on their end. I have had to resort to pulling the battery in order to end a call. I have also noticed that when I receive a call the screen does not go black as it should when you hold the phone to your face. Any one else out there having this issue or know how to fix it?