Oppo r9 plus SMS is coming. What is the reason why it doesn't ring or pop up?

Processing method of mobile phone receiving silent information;

Check whether the phone has turned on the mute mode: Settings-Sound-Silent Mode-Turn on the complete mute function;

Check whether the phone is turned on in Do Not Disturb mode: Set-Do Not Disturb mode;

Whether the mobile phone has turned off the switch of the notification center: settings-notification center-information-notification allowed, status bar display and screen lock display (currently only ColorOS 2. 1 system has this function);

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

Check whether the phone has opened contacts. This session will not be reminded: contact-contact details-this session will not be reminded.

The solution of mobile QQ without prompt information;

Mobile QQ mute, please go to QQ-Settings-Message Notification-Voice On.

It's muted after it's turned on. Please check whether the ringtone, media volume and system volume are turned on. If it is not open, please open it.