Notification Settings on Oppo

Before referring to the following instructions, please read the general notification settings article here.

To whitelist apps follow the steps below: 

1. Go to Settings > Advanced Settings > Battery Manager > Protected Apps, then find the app you don't want to be killed and “protect” it. 
2. Go to Settings > Apps > Advanced > Ignore Battery Optimizations, then find the app and ignore it.
3. Go to Settings > Notification Panel & Status Bar > Notification Center, find the app, then activate “Allow notifications” and also “Priority display”.