I paired it to the built in BT in my '07 Infiniti, but it doesn't seem to be set up correctly or something. Says it's paired, but when I try to make a call, it just shows 'dialing' on the display and I never hear anything.....on my previous HTC Touch Pro2 I would hear the dialing, but when a call connected it seemed to cut out and then back on after a second.....never really used the BT in car feature since it didn't seem to work correctly, but would be nice to be able to since I have it in there. Not sure if this is the phone or an issue w/ the BT in the car, not sure if it's not up to date enough to work with this or if there's even anyway to update what's in the car.....
Also have a Plantronics Discovery 655 headset that I paired it to, that seemed to work just fine on Bionic (no issues w/ old phone either), but I've only used it once to place a "test call" to make sure it was working correctly, was only on for a couple of minutes....