Problem: I always Use the Premium Bluestooth Car Kit in my VW Passat with my HD. It works fine, Pairing, Calls, Phonebook all this is OK but when i leave my car and the Bluetooth connection is cancel to the HD it don´t comes back to its local SIM Card. The Antenna Symbol in the upper Screen have a “!” exclamation Mark and the Radio is not working. The only way to get back is to turn “of and on” the cellular radio (Phone) in the Connection Manager. After that all is OK.
Solution: Uncheck “Require PIN when phone is used”
http://forum.xda-developers.com/showthread.php?t=469088&highlight=rsap