How to turn up the sound of mobile phone information

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;