How the FBI Gets Location Information
Vice has a detailed article about how the FBI gets data from cell phone providers like AT&T, T-Mobile, and Verizon, based on a leaked (I think) 2019 139-page presentation.
EDITED TO ADD (11/12): My mistake. It was not a leak:
Ryan Shapiro, executive director of nonprofit organization Property of the People, shared the document with Motherboard after obtaining it through a public record act request. Property of the People focuses on obtaining and publishing government records.
Randy • October 27, 2021 9:44 AM
That 139-page presentation is interesting. Esp. on page 15 where it shows “examples of cell towers disguised to blend into landscape”.
Also it says that it takes 500 hours of training to become CAST certified. So apparently it is not very straight-forward to get a users location if that much stuff is involved?