Also with android phones: Identifying a known nearby wifi network can allow a faster estimate of the phone&#x27;s location than waiting for a GPS fix.<p>In a weird way, one privacy concern helps mask another: People spend time worrying that nefarious phone-software can locate itself even with GPS disabled... rather than worrying about nefarious server-software using a vast fleet of strangers&#x27; phones to locate and surveil their wireless equipment.