I have a Samsung t819 phone and I recently bought a Garmin Nuvi 780 that has blue-tooth capability. The two paired without a hitch and I made a call with the blue-tooth once but now anytime they pair the phone will immediately restart itself and will not stay on for more than a few seconds at a time. I got a replacement t819 under warranty and it's doing the same thing as the old phone. I don't know if its a problem with this particular model of phone or if its a problem with the Garmin but I would really appreciate some help!