I'm not sure if this is my phone or my car, but I've also seen it when using a headset, so I'm thinking phone, anyone had any issues with Bluetooth just dropping the connection during a call?
I've been using my OGP with both a Blue Parrot B250-XT headset and a Logitech UE moblie boombox for 5 months now. I've had zero issues with either. I also rarely get a dropped call at all, which was not the case with the Atrix 2, the phone I had before the OGP. It would regularly drop calls.