1. Check whether there is any problem with the socket connection;
2. Check whether the earphone speaker is broken;
3. Check whether the Bluetooth headset cable is broken;
4. Check whether mono mode is enabled on the phone;
Restart: Shut down and restart to see if the problem of Bluetooth not finding the device is solved.
Apple 12 Bluetooth headset can not be connected to the solution: First click on the Bluetooth function of the phone to open, turn on the Bluetooth headset power, the phone and the headset began to match, after the match is successful