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Your cellphone is always being pinged by cell towers. These records create a traceable history of wear the cellphone is at all times. Assume the cellphone is always doing this. Even if off. Removing the battery should stop the pings. A Faraday cage or pouch should stop the pings, but hard to feel fool proof.
This same tracking applies to WiFi networks. If you have a laptop open it will default to pinging WiFi networks in order to find a list of connection options.
Any normal operating system (windows, android, apple) will have corporate/government backdoor spyware software. Every image the operating system has access to is scanned. File name, exit & meta data, file hash can assumed to be stored and reported.
If you are dealing with a government level threat you need autistic levels of security. Tails, Libreboot, etc.
Good luck out there anon.
