Are We All Persons of Interest?

Are We All Persons of Interest? | The Daily Grail: "We already know that smartphones can track everywhere you go via the built-in GPS, and the Person of Interest team certainly utilise that function to their advantage. But in the show, Finch's team also often take advantage of a hack which "force pairs" their smartphone with the person of interest's phone, allowing them to hear every conversation within hearing distance of the phone. It's a rather helpful – if clumsily powerful – plot device, allowing them to eavesdrop from a distance with the simple touch of a button."