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Yeah, but computers and smartphones are kind of like food - people need them, they are not luxury goods. You might be able to use your old laptop a while longer or keep using your broken smartphone, but if it really breaks, you will buy another one regardless of tarrifs.
So, what would be the best way to “block the internet” on an Android phone while still being somehow able to use it for communication with the family & friends, navigation and stuff like that?