It can also work other ways: pinging authorities when a phone used by a suspected terrorist or criminal enters an airport terminal, bus station or other potential target. And it works just as well in monitoring the locations of phones the suspect’s phone calls — and who they call and text, and so on.
For the past four years, TruePosition has quietly taken that tracking technology global. In the U.S., Varano says, TruePosition sells to mobile carriers — though it’s cagey about whether the U.S. government uses its products. But abroad, it sells to governments, which it won’t name.