Whistleblower: Cellular carrier giving FBI unfettered access - ars technica
ARS reports: "Computer security analyst Babak Pasdar says that a major mobile telecommunications carrier has a built-in backdoor that provides an undisclosed third-party with unfettered access to its internal technical infrastructure, including the ability to eavesdrop on all calls through its network. In an affidavit that describes the circumstances and basis for the allegations, Pasdar provides evidence which could indicate that the FBI is on the other side of the secret line, engaging in warrantless surveillance of mobile communications."