I've had a Droid Razr for just under a month - it's a pretty cool phone. This evening it began to ring as if it were receiving a call, but there was no call - it just rang and rang. I restarted a few times, but that didn't work. When I put it in silent mode, it did stop ringing. When I took it out of silent mode it began ringing again. After a while it did stop, but I didn't do anything special - maybe it just "healed itself.". Any ideas on what might be causing this? This is not something I want to be worried about.