They aren't saying disable internet for the whole phone. Just a select few apps. Some android roms have this feature (or rooted users can use AFwall) and it's a

They aren't saying disable internet for the whole phone. Just a select few apps. Some android roms have this feature (or rooted users can use AFwall) and it's amazing. You can install a game, block its internet, and the game can't track you, show you annoying ads, or show you full screen newsletters fetched from the internet. Edit: you already can disable internet for the whole phone just leave it on airplane mode for eternity. But as you said, the use cases are quite limited