The Premium kit only works with Nokia phones and the car overrides the sim-card and takes total controll over your phone. phone displays "external sim-mode"
The basic model works with nearly all phones and has less functions than the premium. basic answer/hang-up function. no dialing on headunit or car-computer functions
Thanks. I have just read somewhere that there is an after market audio upgrade (made in china) which includes bluetooth, GPS map, touch screen, DVD video, Mp3, .avi, Xvid etc.... I will look into doing that myself at some stage.