Service Meant to Monitor Inmates’ Calls Could Track You, Too

"As long as they are following their own privacy policies, carriers “are largely free to do what they want with the information they obtain, including location information, as long as it’s unrelated to a phone call,” said Albert Gidari, the consulting director of privacy at the Stanford Center for Internet and Society and a former technology and telecommunications lawyer. Even when the phone is not making a call, the system receives location data, accurate within a few hundred feet, by communicating with the device and asking it which cellphone towers it is near."