Technology

Wouldn't just keeping your phone in a metal box prevent it from communicating with anything? Keep your phone in a metal box and only take it out when you need it. Only take it out in a location that isn't sensitive. Or hell, just make a little sleeve out of aluminum foil. Literally just wrapping your phone in aluminum foil should prevent it from connecting to anything. A tinfoil hat won't serve as an effective Faraday cage for your brain, but fully wrapping your phone in aluminum foil should do the job. Even better, as it's a phone, such a foil sleeve should be quite testable. Build it, put your phone in it, and try texting and calling it. If surrounded fully by a conductive material, the phone should be completely incapable of sending or receiving signals.