When I first got my Motorola Droid, I was having issues while I was in calls. The call would often be muted and the other person could not hear me or the call would be dropped. I thought my phone was defective so I returned it for a new one and the same things happened. After I experimented a little bit, I found out that the the proximity sensor would not worl when it came in contact with my hair, that covers my ears. It is difficult to impossible to move all of my hair out of the way when on a call. Does anyone know a way to lock the phone when on a call? Can the lock button be used or is there an app that works to do the same thing. Please help.