I think (but it is complicated since I only still am reading "RTFM" 183 pages RNS and 233 pages HTC phone)
the RNS510 and VW premiumkit (my kit) takes it straight from the SIM AND PHONE MEMORY....
after that.... the RNS510 disables the phone by putting it into a sleeping mode to save battery...normally that does not matter since ALL the adresses have been synced in the RNS510

If I am right you should forget about SIM and use outlook on your PC make all the adresses....sync it with the sync prog with your phone...(as I did a minute ago) ....and sync it with your car....(as I will do the 2nd of April).....and voila you have got the "Bourne Identity" mobile-scene..

NOW DO NOT TELL ME THAT THERE IS NOBODY OUT THERE TO CONFIRM THIS....
