I'm new to the Droid X2 and noticed recently during calls using my bluetooth headset the screen blanks and locks. Since the proximity sensor won't be of any help while on bluetooth, is there a way to prevent the blanking/locking during a call? If not, is there a way to unlock without hitting the top button. I tried the top button and it dropped the call. Goal is to be able to get back to the dialpad during a call.