I have a Garmin Nuvi 765 paired with my iPhone for bluetooth handsfree. When I get an incoming call, the Nuvi will display "Unknown caller" even though my iPhone shows the name, or the number if I don't have a contact. I think the iPhone is the problem because I put my SIM in an old Windows Mobile phone I have laying around the house, called it and my Nuvi showed the name. Anyone else having this problem? THanks