There is no ringtone and SMS prompt on OPPO mobile phone. What happened?

Processing method of mobile phone receiving silent information;

1. Check whether the mute mode is turned on: Settings-Sound-Silent Mode-Turn on the complete mute function;

2. Check whether the phone has turned on the Do Not Disturb mode: Set-Do Not Disturb mode;

3. Does the mobile phone turn off the switch of the notification center: Settings-Notification Center-Information-Allow notification, display in the status bar, and display on the lock screen (currently only ColorOS is available.

2. 1 The system has this function)

4. Whether to turn off information notification in mobile phone information settings: information-settings-information notification;

5. Check whether the contacts in the phone are open. This session will not be reminded: contact-contact details-this session will not be reminded.

Setting method of mobile phone short message ringtone:

1.ColorOS

Version 3.0, enter Settings-Sound and Vibration-Information Ringtone, and select Ringtone.

2.ColorOS

Version 2.0, set-sound-information ringtone, and select ringtone;

3.ColorOS

1.0 version, set-sound-information ringtone, and select ringtone.