I have 2006 A4 sedan. The Bluetooth unit stopped working last week. No trouble until then. It's not the phone. I have appointment to have dealer check it next week. What I want to know is if there are BT units that handle phones/voice as well as music etc from iPhone. As I understand the BT protocol for voice and music are different. If I have to replace it and such a unit is available then that may be the way to go. Any help would be appreciated.

Phil