Disabled mobile data but some data still transmitted

Question

I have expensive mobile data plan so I disabled mobile data in settings. But I still have a little amount of mobile data traffic every day that I paying for. (something near 100-1000 bytes, I inspected it in payment detalisation provided by operator)



I use home wifi for internet access so I need to disable only mobile data but not wifi.



I enabled restrict background data option but still have mobile traffic. (screen1)



In APN menu I can't delete/edit default APN supplied by mu operator. I created and selected fake APN as sugested in How can I disable mobile data completely? but still have mobile traffic.



How can I (but not disable wifi)?



I suspect OS Android or Google services make this traffic.
(screen2)



My phone is LG X style K200DS Android 6.0.1.


— Yaros | Sources

Answer

Install app like Glasswire and you can monitor your outgoing traffic. Or you can use firewall apps and try to disable the data on every app.


— harpratap | Sources

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