What's wrong with Apple 6 mobile phone WeChat voice without sound?

There are two aspects here. One is that there is no prompt tone when WeChat receives the message, and the other is that the voice message has no sound.

Aspect 1

1. The sound set by the mobile phone system is low or mute.

2. You turned off the new message prompt tone of WeChat.

Aspect 2

1. wechat may not have the speaker function turned on, so you can't hear the sound without the speaker (the sound is played in the receiver);

2. The WeChat sent by the other party didn't speak when recording, or there was something wrong with the microphone of the other party, so there was no sound;

The smallest possibility, that is, the speaker or receiver of your mobile phone, is to find a way to restore the factory settings first, otherwise it will be sent to the after-sales inspection and maintenance.