Ask a good-hearted person to talk about what if there is no sound outside the Apple 5s?

1. Let's see if the buttons on the left side of the phone are set to the side away from the screen. If it is set on the side far away from the screen, just dial it back in the opposite direction.

2. Adjust the volume button to see if it is mute. If it's silent, turn it up.

3. Enter Setup-do not disturb mode and observe whether the "Set Time" button is enabled. If enabled, check whether the current time is the set Do Not Disturb time.

4. If all the above are invalid, you need to go to the maintenance point to repair the mobile phone.