In the traditional nine one one system, you have e the wide er data base of all wird addresses. From your home phone, there'd be a data base that the system would look up while it's routing to nine on one. But both apple and gogle have their own secret source. To give you the exat wif router is, right? They know the location of wifi routers, or public wifi routers, and they kind of triangulate around that. And even if you don't connect those wy fire routers, it knows you passed by them and tried to connect....