I have been trying out the Bluetrek v1.2 w/ dongle on the 600. They work like a charm, including being able to end the call with the headset button (mode #5). However, what would make this a winner would be a car cradle, that was able to connect to the dongle. This would allow me to dock the 600 in the car and make it immediately talk to the headset. Anybody have any ideas if there is an existing product that can do this, or how one might be modified?