Two congressmen are trying to pry information out of wireless carriers about how closely they track their customers' whereabouts.
Letters sent to AT&T, Sprint, Verizon, and T-Mobile this week ask what personally identifiable information is stored, how long it is kept, and for what other purposes it's used.
Reps. Ed Markey (D-Mass.) and Joe Barton (R-Texas) asked for responses no later than April 19. Their request came after Germany's Zeit Online published data showing that a cellular provider kept track of tens of thousands of locations that one person visited over six months.
Their letters could … Read more