I'm talking on my iPhone, walking toward my Model S. When I get close the car comes alive, as you would expect with the fob in pocket. Then my call was gone, no noise, what the heck. Open the door, sit in the driver's seat, and realize my call is now on speaker phone in the car. The person on the other end had hung up, because it appeared the call was dead. Is this the way it is supposed to work? I think it might be better to prompt the user, instead of grabbing a call on activation of the car. I haven't read the Bluetooth spec in many years, and that was before cellphones, anyone know what the proper behavior is?