It's... probably a similar technology? Cell phones connect to several towers to get a good signal, as I understand it. Something about how they work. It's probably close enough, though. Including that if you're too far away or too deep inside a building, the signal's weak, and you can't use it.

[She doesn't understand how she's gotten on this topic, but she doesn't really mind it? It's giving her someone to talk to, and that's always good.]