I have Twincall and my Primary phone is with me and my Secondary in my Car. My Primary phone is always on, when i start my car, the Secondary phone switch on automatically. Then when I stop and switch off the car, the Secondary phone switch off automatically. Then I have to switch my Primary phone off and then on again to recieve calls...this is frustrating(can sometimes forget to switch off and on, and then miss all the calls)! Do any one have a solution?