@HistoPol @benjamin @smallcircles
I'm definitely not an expert. But if you have a device that 'can' connect to the mobile network...and you don't have a physical off switch, can you really trust that it's off? depends on the jib of your tinfoil hat :) Next level, even with a physical switch, do you trust that switch? etc. it's a rabbit hole of 87 layers of tech between you and actual privacy.
The only 'sure' method is to not bring along any device with such capability...or any device to be truly sure.
And even then...
There was a story of a guy who hacked his EZ Pass to play a cow sound when it was scanned. Turns out NYC was using the devices to track traffic all over Manhattan entirely not for toll uses. https://www.nbcnewyork.com/news/local/e-zpass-tracking-cow-midtown-nyc/1985419/
Is it 'identifiable' to you? kinda, but they'd need to link up a few data sources.
Etc. now imagine they could do the same thing with. your. tires.
https://innotechtoday.com/3-ways-rfid-is-changing-the-tire-industry/
Privacy is elusive...