Why did the phone suddenly get louder?

1, press the mobile phone volume plus key to turn up the sound;

2. Enter the mobile phone settings, turn off the mute mode in the sound, and set the mobile phone to the ringing state;

3. Check whether there is sound during the hands-free telephone call, and eliminate the abnormality of playing music, video and other resources;

4. Check whether it is restored after restarting the phone;

5. Check whether the speaker is covered by film or mobile phone case, and whether the speaker is covered by dust and foreign objects;

6. If the above methods are still not improved, it is suggested that you can enter the mobile phone settings, select more settings, click Restore Factory Settings, and view after restoring all settings. If there is still no improvement, it is recommended to contact the mobile phone for after-sales inspection and verification.