Armed with two rooted Android phones and three Wi-Fi hotspots running cell site simulator detection software developed by EFF, nostr:npub14lpy6kf4n66qtjttw76gcl3swt02txtw2sx7vamft3s69rj9kt8s3wujhu conducted a first-of-its-kind wireless survey of the signals around the Democratic National Convention.

https://www.wired.com/story/dnc-hidden-signal-hunt/