Can you block Internet on a phone?
The first method to block internet access to an app starts by opening Settings and going to Mobile network. In the Android Mobile network settings, tap on Data usage. Next, tap on Network access. Now you see a list of all your installed apps and checkmarks for their access to mobile data and Wi-Fi.
Is there a way to block Internet access?
Block App Internet Access Using Android
Tap the menu icon, then “Data usage control”. From here, you'll see a full list of apps, and can tap the dropdowns to the right of each one to control whether you want them connecting online via Wi-Fi only, data only, or not at all.