OppoA55 has been muted, but is there any incoming call or ringtone?

2. Drop down the top curtain menu to see if there are unread messages.

3. Check whether the alarm clock or calendar has a setting reminder.

3. Back up mobile phone data (phone book, SMS, multimedia files, etc.). ), restore the factory settings or send the mobile phone to the nearest service center for testing and further processing.

other

1. Press and hold the power button to turn off the mute mode in the prompt box;

2. In the standby interface, drop down the notification bar and click the mute off icon in the notification bar;

3. Long press the Volume+key;

4. In Settings-Sound Settings, turn off the mute mode;