Apple 1 1 I don't know how to mute it.

It may be that iPhone 1 1 has turned on manual static and dynamic sound modes, so you can turn off the mute button on the left side of the phone by returning to normal mode. Maybe iPhone 1 1 opened do not disturb mode. You can click the ringtone icon button in the mobile phone control center to turn it off. The following is a detailed introduction:

1. Maybe iPhone 1 1 has turned on the manual sound mode. You can turn off the mute button on the left side of the phone by returning to the normal mode.

2. Maybe iPhone 1 1 started do not disturb mode. You can click the ringtone icon button in the mobile phone control center to turn it off.

3. If there is no sound on iPhone 1 1 during the call, you can press and hold the Volume+key to increase the volume of the phone.