A lot of people wonder whether this is tracking theories are for real. Now at least one very popular way of how its currently being done is exposed.

Wired broke the stories about the NSA monitoring something like 25% of all domestic cell phone traffic. The fact that all investigations into it have been stopped citing "National Security", and the former President Bush defended the tactic all are pretty good signs pointing to "YES".

There's a big difference between carriers knowing where you are and ad companies/law enforcement knowing without a warrant.

And all the FOIA request simply states is that something like

A) We are investigating Carrier IQ.

B) We have physically recovered phones as evidence and extracted Carrier IQ data.

I want to believe that Big Brother is watching, really, I do, but this isn't a convincing argument.