For many years, cellphone operators around the world have complained about Facebook and Google: The American tech giants use the operators' cables and towers to hand out free phone calls and messaging services to people in their countries, eating into profits and grabbing customers' data.
Recently, one operator, Telenor, decided: If you can't beat 'em, join 'em. And in the process, it hunted down the kind of link between people's digital and physical personas that not even Google has.
After A Terrorist Attack, A Fingerprint Drive