To ensure proper audio functionality, your phone MUST connect to BOTH:
π΄ Failure to do this will result in NO SOUND!
Video guide FOR 540C / 570 / 600 / GT
https://youtu.be/2VKIkeWxSMU?si=9KPz_LCjNM1oKo5V
Change the language π and enable Android Auto π: YouTube Video.