How to prevent system apps from using Mobile Data?

ThatTomGuy

I have been carefully limiting access to Mobile Data for my apps but I notice that an app called "Android OS" appears to be consistently consuming a few hundred kilobytes each time I reboot.

It might be periodically consuming data and I just notice on reboot, I'm not sure.

Anyone know how I can stop this? It's not an app you pick in the app list (where you just click into App Permissions and then toggle background data off) and I haven't noticed any menus that allow me to restrict data on this or other "system apps".

Thanks

bookreader

The OS has to establish the data connection, and test it to make sure its good. It also has to do other things like pulling agps data when needed, DNS lookups, check for updates, etc.