Recently installed V60I Motorola Mobile Phone in my 2001 ML55 AMG. Have been reading in-vehicle guide and am lost. Have questions about unlocking the phone, is this important?; if in use is it unlocked? The big question is how do you know there is a missed call and how do you retrieve missed call messages through the vehicle's radio control unit? When someone calls should their number show up on the vehicle screen? Have AT&T service.