Using a few anti-static bags inside one another doesn’t block 100% of signals but it cuts range down by a lot. But also, if you’re looking for this high of a security level, wouldn’t it be easier to just find a phone with a removable battery?

Sorry, Microsoft might make crappy software, but they aren’t actively trying to invalidate my existence as a person. Absolutely not comparable.

I would look for a dongle that specifically markets itself as being Raspberry Pi compatible. Most stuff you find will prioritize Windows, but if it’s marketed to work with the Pi you know it’ll have at least some level of Linux compatibility. Once you find one, try to figure out what chipset it uses, then search if it’s supported by a handful of the distros you wanna try.