I was listening to a CD and suddenly the screen changes to the phone screen and I get a "call waiting" and "talking" message. I didn't hear the phone ring. The CD audio was still running. No matter what button I pressed -- off-hook, on-hook, transfer, whatever -- the message would not go away. I checked my phone and there was no call. When I switched to map display it went away. But as soon as I hit the "phone/info" button, the call waiting message, with a counter, was still being displayed. Anybody have any idea what's going on? I don't know if this is related, but sometimes when I try to make a call through voice activation, I get a message saying the phone is busy and the command cannot be completed.