1. Try phone settings-sound-adjust the volume.

2. Try to change other audio players and audio files to test the mobile phone speakers.

3. Back up mobile phone data (phone book, SMS, multimedia files, etc.). ) and restore factory settings (enter phone settings-reset/privacy/private-restore factory settings).

If the problem still exists after returning to the factory, please send the mobile phone to the nearest Samsung service center for testing and further processing.