Step 1: The volume of the phone call is not turned on. The solution is: try to dial a phone number, and press the volume up key on the side of the phone when dialing or talking, so as to turn up the volume.

step 2: if the volume of the car navigator is not turned on, just turn it on.

step 3: go to settings-sound, find the media option, and turn up the volume of the media.

Step 4: It may be that there is no pairing connection between the car Bluetooth and the mobile phone at all. The solution is:

1. First, the mobile phone and the car Bluetooth device should establish a pairing relationship. Turn on the Bluetooth function of the mobile phone and the vehicle-mounted Bluetooth device respectively, and set the Bluetooth setting of the mobile phone as "visible to all" or can be searched or opened for detection;

2. Then search for Bluetooth devices in the mobile phone, and select the pairing connection after finding it. The pairing password is: , and the connection is successful after pairing. (Some pairing passwords are: 1234)

3. After the car Bluetooth is successfully connected with the mobile phone Bluetooth, you can make and receive calls; Play music on your mobile phone and enjoy music on your car Bluetooth device.

AUX interface is usually located in front of the gear handle, or in the central armrest box, or in the glove box in front of the co-driver.