There's no card, the modem is inside the and you have to perform surgery and peel off the panel, because they're super fucking thin there's no unscrew it and grab it from the empty middle part, which will very likely crack it if you're not good and lucky.

Everything, often even the PSU, is now baked onto a single board.

I gotta figure out where I heard that. I may have conflated different issues with different tech.

Look at the tech Jesus video, they aggressively scan networks and connect to anything they can because doing so makes them money.

Guest with open hotspot on phone.

Because someone having better devices than you or your neighbor getting some long range access point.