There is always background music playing when the mobile phone makes a phone call. What happened?

1, switch the machine on and off again.

2. Observe after uninstalling the recently installed third-party software.

3. Back up mobile phone data (phone book, SMS, multimedia files, etc.). ) and restore the factory settings.

If the problem of restoring factory settings still exists, it is recommended to send the mobile phone to the nearest service center for testing and further processing. "

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Matters needing attention in using mobile phone

1. Use mobile phones as little as possible, and don't talk for a long time if necessary, or use fixed telephones as much as possible to reduce electromagnetic radiation.

2. The mobile phone has the maximum power when the signal is just connected, so it is best to put the mobile phone away from the head at the moment when the signal is connected.

Try to turn off the mobile phone when not in use. As long as the mobile phone is connected to the power supply, it will emit electromagnetic radiation, but the radiation emitted during the call is larger than that during standby. When in standby, try to put it away from your body.