How do you get audio working on pioneer deh-6250bt bluetooth during a call?

To get audio working on the Pioneer DEH-6250BT during a call, ensure that your phone is properly paired with the car stereo via Bluetooth. During the call, check that the audio output is set to the Pioneer unit; you may need to select it as the audio source on your phone. Additionally, make sure the volume on both the stereo and your phone is turned up. If issues persist, try disconnecting and reconnecting the Bluetooth connection or restarting both devices.