1. There is a current problem in the headphone port of the mobile phone. You can change the headset to check;

2. The headphone jack is not plugged in properly. You can check it by rotating the headphone plug;

3. If there is a problem with the headphone line, the line is old and damaged due to tangled wires. You can shake the headphone wire and the plug connection part to check;

4. If there is current sound caused by surrounding electromagnetic radiation, you can change the environment to check whether there is any noise. .