One plus ace2 thunder extreme sports preview no sound

1. First, check whether your mobile phone is in silent mode and turned on.

2, or the phone sound is set to the lowest, can't hear.

3. Enter the settings, status bar, notification and management notification, and then open the SMS prompt.

4, sometimes the phone is stuck or there is a bug, try again. If it doesn't work, take it to the maintenance point for testing. There is something wrong with the mobile phone, too.