What's the matter with no sound in mobile phone voice?

The phone can't hear the sound. The phone can't hear the sound, which is caused by the fault of the phone's voice setting. The solution steps are as follows:

Mobile phone: Apple 1 1

System: ios 14.2

Program: Set 2. 1

1. Unlock iPhone to the home page of the screen.

2. Press [Volume] on the left side of iPhone to adjust the volume and turn the media volume to the maximum [[fullbox]].

3. After the volume adjustment is completed, find the "Settings" icon in the application and open it.

4. After entering the "Settings" center of the mobile phone system, select "General" settings from the list of options to be opened.

5. Click "Accessibility" at the bottom of the "General" menu bar to enter the next step.

6. Under the auxiliary function management page, drag the channel balance setting button to the middle to keep the channel balance. (When the mobile phone channel is set to unbalanced state, there will be no sound failure on the iPhone. )