For Android: learn the hard reset combo for your phone, especially if you encrypt it.

After rebooting, pattern/PIN will be required to decrypt the phone. Biometrics won’t work for this step. This is what graphene does for security, tries to keep the phone in a “before first unlock” state by rebooting on a timer. You can’t even read anything over USB/ADB, it’s scrambled until you unlock the phone.

The only drawback to just keeping your phone in this state is none of your apps are loaded, so no notifications/updates/processing at all.

The kicker to this sort of thing, is the pirated versions usually have the checks removed… and don’t need internet.

Check around your local walmart/target/walgreens etc, that have those photo labs/booths. Some have proper bulk photo scanners publicly available, and will (or you can) pass your photos through one and spit out a CD for fairly cheap (sub-$10 last I checked, but years ago).