For Oppo - ColorOS version of Android
Notification not showing
Note that when you have a disconnection in internet, notifications are disconnecting too.
Check the settings of your phone
1. For all ColorOS versions: Go to [Settings] > [Notification and Status bar] > [Manage notifications], tap the application that you wish to receive notification, and enable [Allow Notifications].
2. Make sure that the [Low Power mode], [Airplane mode], and [Quiet Time] or [No disturb mode] are turned off.
3. Allow apps to continue running in the background through the ColorOS version of your OPPO phone. Check your ColorOS version through [Settings] > [About phone].
For ColorOS 11 - 11.1: Go to [Settings] > [App management] > [App list] > select the application > [Battery usage] and select [Allow background activity].
For ColorOS 7-7.1: Go to [Settings] > [App management] > [App list] > select the application > [Battery usage] and select [Run in Background].
For ColorOS 6.0-6.1: Go to [Settings] > [App management] > select the application > [Power Saver] and select [Run in Background].
For ColorOS 5.0-5.2: Go to [Settings] > [App Management] > select the application > [Power Saver] and select [Allow Running In The Background].
For ColorOS 3.2: Go to [Settings] > [Battery] > [Energy Saver] > select the application and turn off [Background Freeze] and [Abnormal Apps Optimization].
For ColorOS 3.1 and above devices: Go to [Settings] > [Battery] > [Energy Saver] > select the application and turn off [Background Freeze], [Abnormal Apps Optimization] and [Doze].
For ColorOS 3.0 devices: Go to [Settings] > [Battery] > [Others] > select the application and Turn off [Freeze when in Background] and [Automatically optimize when an anomaly is detected].
4. Tap the [Menu] button and slide down the application page until you see a lock icon in the upper corner to allow applications to run in the background. Then the application will keep running in the background.
5. Go to [Phone Manager] or [Security Center] or [Security] > [Privacy Permissions] > [Startup Manager] and turn on the button to allow the application to start on boot and start in the background.
*In some devices, go to [Phone Manager] or [Security Center] or [Security] > [Startup Manager] and turn on the button to allow the application to start on boot and start in the background.
