You can use foil covered Doritos packet 
as a Faraday cage , no really 😂 stick your phone in and it will be isolated from GSM radio and wifi signals ,🤔
Wild News. Makes me think, is my phone in my pocket just a remote bomb waiting to go off if the government hates me? Maybe it's not actually possible, but it made me think that instantly lol
https://v.nostr.build/XTbsADflwYlnOvsf.mp4
Discussion
LOL so have you tested this?