[jeroenhd]

Not buying a carrier phone or buying an iPhone (which doesn't permit carriers to inject the same type of crap into the device, they can only influence access to certain settings). AppLovin cannot install anything in the background without deep system access, and manual installation of non-Google apps requires confirming at least three popups.

There are antivirus apps on Android that will warn you for this crap, but an antivirus cannot work on an operating system designed to install malware.