Using Android Auto in your car to make calls couldn’t be simpler. Tap on the phone icon on the screen and tell Google to call the person you want to talk to. When you have finished your call, press end on the touchscreen or the end call button on your steering wheel.
To receive a call, simply press the call button on your steering wheel or the answer button on the touchscreen.
You can also access your voice messages through the phone screen’s menu where you can see missed calls, check voicemail or check call history. If you want to return your last call, tell Google.