When in my car, I try to make or receive a call on my car stereo and it will not transfer the audio. My phone is paired successfully and I can listen to music with no issue. It is only when trying to use Bluetooth audio for phone calls in my car.
When I am on a call I can see on the call screen it shows my car (WRX) that it is paired with. When I click it to transfer the audio, and it usually auto transfers in normal function, but now it doesn't so I click on where it says WRX and it will not transfer.
Bluetooth word would say WRX when I am in my car paired.
When you are in your car and your phone connected, on the phone go to settings, bluetooth, select the gear icon on the car connection, enable the calls togle. Example of mine (it's turned off because i'm not at the car at this moment) 
