Cellphone carriers filed reports with the U.S. Congress indicating that the telecommunication companies "responded to a startling 1.3 million demands for subscriber information last year from law enforcement agencies seeking text messages, caller locations and other information in the course of investigations. ...AT&T alone now responds to an average of more than 700 requests a day, with about 230 of them regarded as emergencies that do not require the normal court orders and subpoena. That is roughly triple the number it fielded in 2007, the company said," according to The New York Times.
2012-05-29 ATT Response to Rep Ed Markey - Domestic SpyingRead more letters to mobile carriers reagrding use of cell phone tracking by law enforcement on Rep. Ed Markey's website.