Notice: This topic doesn’t directly mean open source or Fdroid specifically, but can involve it at times. You can skip some of it if it is too far for some of you and you will still be more protected then before.
The 2 big ways to protect yourself first.
No, not the firewall yet
Open source app store: First thing you should do is download and install an open source appstore like Fdroid to keep getting some of your apps simple and less invasive then say on the Google Play Store. Alot less of the apps track you compared to the amount that do track you on the defualt android app store.
Disable/uninstall preinstalled apps: The big way to protect your privacy without a firewall would be to stop prebuild/invasive apps apps in their tracks. Uninstall/disable apps. Don’t mess with system apps beside any Google related system apps unless you know what you are doing other wise you could mess up your phone to point of needing a factory reset. Trust me I would know. System Google apps are safe to disable if you dont use or dont want them. If you do use google leave them alone.
Okay, now we talk about firewall: Some apps you just can’t disable or uninstall and they will just always run on your phone. Next step would be to then install a firewall to counter most of these apps, like netguard. All it will do is block them/attempt to block specific apps from making a connection while allowing other apps to. You’l have to dig into the settings on Netguard specifically to be able to block system apps as well by defualt it just does user apps.
I’m not gonna go vpn as much, not at all really tbh they are a sollution with new risks tbh. All I would say about it is don’t write any illegal search terms in search boxes or forms online that would make the fbi wantvto keep tabs on you. Keep your messages online in a legal area rather then in an illegal area.
Any questions, got your own input? Post bellow.