Why can't I hear voice on my mobile phone?

It may be that one of the media volume and ringtone volume in your mobile phone is not set to the maximum.

Mobile phone sound is divided into media volume and ringtone volume.

When using the media volume causes the volume to increase:

QQ wechat sends and receives voice

videotape

The voice of people talking in the video

The volume when watching the video.

The volume of music played when listening to music.

The volume of the bell mainly leads to the volume of the sound:

The volume of the bell when you make a phone call.

The sound of an alarm clock

The sound of the game interface when the game is open.

Prompt tone for sending and receiving short messages

Solution:

Open the setting interface-sound and vibration-volume adjustment (location of OPPO mobile phone).