Re:Google knows where we are, and so do advertisers
by andysch on Thursday November 12, 2020 @12:13PM
(#25071964)
lineageOS is fine, though without play services | microG heaps of apps are broken.. I'd recommend switching to a non-AOSP based OS if you won't use those services, but if you stay on android you should definitely check iodéOS
You can use something like Netguard to get some idea of what's going off your device (if you're rooted AFWall). It's not perfect, but it's essential software in my opinion. You can see somethings that of that get through Netguard on PiHole, if you have it setup on your network.
Removal of play services is one step, but pretty much every app on the phone from the stock keyboard ("Gboard") to all pre-installed apps call home. In the newer versions of Android, Gboard and other apps will complain every few seconds if/when Play Services is Disabled, as they don't get to send the telemetry and usage data to Google.