1. The volume of the car navigator or mobile phone is not turned on. After playing Bluetooth, there is no sound. The solution is: first, check whether the devices at the two ports are in mute state, and adjust the volume to nature to hear the sound;
2. Wrong Bluetooth connection. You may not be familiar with your car's Bluetooth performance, so the music playing port of your mobile phone can't match your car's Bluetooth system, so you can only answer the phone. Solution: Just change the Bluetooth playing frequency band of the mobile phone or the multimedia option of the vehicle.
3. Because the media audio of the mobile phone to be connected is not turned off. Solution: If the media audio in the Bluetooth mobile phone is not turned off, it will cause signal interference to the Bluetooth function. Just turn off the media audio inside. Million car purchase subsidy