“Your cell phone company knows everywhere you go, 24 hours a day, every day. Malte Spitz, a German politician and privacy advocate, found out just what that meant. He used German privacy law to force his cell phone carrier to reveal what it knew about him.”

“The New York Times tried to find out whether U.S. mobile phone carriers have similar data about their subscribers, but it said “[t]he major American cellphone providers declined to explain what exactly they collect and what they use it for.”

- via EFF