I have a Mk3 with the DVD nav and I used to link to my old Motorola phone no probs. I have just got a new Samsumg B5722 and the phonebook names eg Maggie 01234 56789 are now displayed as Hexidecimal eg FC23AB..... with the correct phone number. As all was ok with my old Motorola, the phone book transfered data would seem to be incompatible with the DVD nav. So I would be interested in hearing from anyone else who has had this problem and what they have done (to their phone or the DVD nav) to fix the problem. Thanks, Spoonrest...