There are allusions in open sources (e.g. the Afghanistan Papers—a series of interviews the government conducted to perform a "WTF went wrong" appraisal of the

There are allusions in open sources (e.g. the Afghanistan Papers—a series of interviews the government conducted to perform a "WTF went wrong" appraisal of the war in and occupation of Afghanistan, that has since been released to the public) to some agencies having free (as in, unrestricted, not gratis—I expect the arrangement involves money changing hands) access to customer data & activity at several major telcos. I'd be very surprised if none of Google, Amazon, Facebook, Twitter, Microsoft, and Apple have similar arrangements with them, these days. I'd also be surprised if all of them have such arrangements, but I doubt none of them do.