After 2.5 years I just received the first call through the car . I don't know how because I thought the phone was switched off. However, it was the wife wanting a late addition to the shopping list. I have the volume turned down for calls and was just entering a long twisty section of road needing concentration and both hands on the wheel so the conversation went a little like this... " Hey its me ... can you get some parsnips and buttery pastry? " " Yeah OK " " Are you still driving " " Yeah, its come through on the screen " " What ! I can't hear you " " Shouting , Yes its the car doing it " " Wow I didn't know it did that , its not very loud , is it. " " Well I cannot get to the volume control " " What ?" " Right, see you later " Red button.
So , there you have it my complete history and knowledge of in car telephonic experience , in any car, so how did it receive a call when I never had mobile service connected ? You may guess from this, that my knowledge of these hateful devices is slightly above non existent.