I have a Nuvi 1390T SW 4.6 BT 1.73 and the pairing (sync) with my iPhone4 16GB FW 4.2.1 is not working properly.
On the very first Bluetooth sync it's ok, i can acces the phonebook and the last call list.
But if switch off then on the Nuvi the sync does not bring the phonebook and the last call list, i a only able to dial a call, not very safe while driving...
The only workaround working to bring back those functions is to "break" the BT nuvi connection on the iPhone and reboot the device. very annoying !!!
Does anyone have the same problem, is there any kind of fix.
I have not upgrade firmware versions on purpose waiting for someone to tell me what version is OK.