The reason I say use a phone is in another life. If I took electronic media as evidence, I would place the item in a faraday bag until we could extract the info. It prevented bad actor from remotely wiping electronic evidence until we could extract it in a lab.
I wasn’t talking about commercial Faraday bags but about DIY stuff like a 55 gal. barrel or a garbage can. There could be gaps in the welded seams. The author of the article said that EMP radiation could enter a very small gap. That’s why he said testing by a phone wasn’t good enough. I have no idea if he was correct.
