The message tone of Apple 6 mobile phone was accidentally muted, and then there was no sound. How can I get it back?

There is a button that can be broken up and down. On one side of the phone, the volume is adjusted below.

Generally speaking, there is no sound when making a phone call on iPhone6, and the phone is set to mute and turn on the Do Not Disturb mode.

First, check whether the phone is set to mute. The mute button of Apple's mobile phone is on the left side of the phone. Check it carefully.

Second, the mobile phone can be turned on in do not disturb mode. If not, you have to go to a special repair shop for repair.