Just re-program them using NavCoder. Sometimes, upgrading software will cause the programming to be reset to default.
check your service menue settings: does it show 'auto em call' = yes?
Does it still show the right car and VIN?
If the car and VIN are wrong, the nav lost its programmed settings.

You can re-program them using my NavCoder software.

Loading new SW into the nav doesn't change the Bluetooth system at all, 'Telephone' should still be visible on the nav Menu.

If not, reset the whole car by disconnecting the battery, waiting 10min, then re-connecting

Jochen