U.S. cellular service providers have been collecting several types of user data, often without the customer’s knowledge, The Washington Post reports. Per their privacy agreements, AT&T, T-Mobile and Verizon collected user browsing history, location data, call logs and application use. AT&T automatically enrolled customers in a “Relevant Advertising” program, where the company views browsing history and videos a user watched to send targeted advertising. Verizon had a similar program, called “Custom Experience.” T-Mobile did not extensively collect data like AT&T and Verizon but can still view user app usage and watched videos.