They're using a rooted Android phone and an app called Network Signal Guru: https://play.google.com/store/apps/details?id=com.qtrun.QuickTest https://play.googl

They're using a rooted Android phone and an app called Network Signal Guru: https://play.google.com/store/apps/details?id=com.qtrun.QuickTest https://play.google.com/store/apps/details?id=com.qtrun.Quic... At least the free version of the app doesn't seem to "decrypt" anything, but it has root access and access to the modem, so it can read these logs. It can also disable bands and try to lock to a specific mast (like dedicated 4G/5G routers can), which is useful if you're trying to use mobile data as your main internet connection.