If so, try turning up the sync volume when your call is answered and whilst the person is actually speaking. The same applies to SatNav if you have that.
Also, ensure that you have done a sync master reset.
The radio and USB music works in a different way as far as volume is concerned.
Yes, I mean phone calls.
Voice navi works
But when making a call, the media option becomes dim and you cannot switch to Bluetooth. When you end the call, it returns to normal.
With Forscan, go to the “main module + hidden and engineering mode” configuration and look for the “TouchScreen” option. Select Sync 3 or “8-inch screen” there. This tells the BCM that your Sync 1 is now Sync 3. For other models, this usually has to be done through the ACM via AsBuilt, but for models like mine, the BCM controls this setting.