At least one major U.S. carrier faces the wrath of the FCC for selling customers' location data

It appears that one or more unnamed U.S. wireless carriers have . The regulatory agency says that it will take action against these companies for selling its customers' real-time location data without permission. With this information, third party firms could track smartphone users. Pai and the FCC were referring specifically to a report last May . The latter collects real-time data from smartphones and the website glitch allowed location data to be obtained from any phone running on Verizon, T-Mobile, AT&T, and Sprint.

, Pai wrote, "I am writing to follow up on ...