I wouldn't take it for granted that these actually use GPS at all, let alone exclusively (e.g. they might also use cell tower or BSSID triangulation). It's pret

I wouldn't take it for granted that these actually use GPS at all, let alone exclusively (e.g. they might also use cell tower or BSSID triangulation). It's pretty common to use "GPS" generically for other methods of automated geopositioning.