I mean, if you turn off WiFi radios, unplug from ISP, remove the antennas, and then reset with a single Ethernet connection, it’s really beyond the typical imag

I mean, if you turn off WiFi radios, unplug from ISP, remove the antennas, and then reset with a single Ethernet connection, it’s really beyond the typical imagination to have the device still compromised. If you don’t trust it at that point, just get your own. Air gapping is the best you can do. So.. if you have access to a subterranean lair, take your laptop and modem/router down there (at least 50 feet). Then perform the reset.