Oppo
Allow Unlimited Data for Apps in Data Saver auf Oppo
Data saving mode on Oppo restricts background mobile data for most apps to reduce consumption. This is useful for keeping your monthly plan under control, but it can silently block messaging apps, cloud backups, or music services from working outside Wi-Fi.
To fix this without turning data saving off completely, you add the app to the unlimited data usage list. This exception only applies to the app you select; every other app stays restricted.
Menu path
Settings ➔ SIM card & mobile data ➔ Data usage ➔ Data saving ➔ Apps with unlimited data usage
In that list, find the app and turn the toggle on. Turn it off again if you want the app to fall back under data saving restrictions.
This setting is available on ColorOS and applies system-wide, independent of the specific app version. If an app still has no mobile data after whitelisting, check separately whether background data or mobile data is disabled for that app under its own app settings.

