GOS is up and works great. I make all calls via VoIP app (with G-services on 2ndary user), thus my "SIM number" is private. (note, this is background. If you don't agree w/ method or 'private', ignore that and focus on next section)
I can connect handset to the car (in-dash generic android) via bluetooth and initiate the calls from handset w/ VoIP app. When I try to do the other direction (initiate calls from car), the call is connected via my SIM number.
Are there any recommendations / methods to configure or force the handset to use the VoIP app for the calls initiated by the car over bluetooth?