AT&T says it will stop selling all location data from mobile phones to brokers following a report that companies are still selling that information to shadowy companies without customer knowledge.

Last year, AT&T and other carriers pledged to stop providing location information to data brokers. But AT&T made an exception for useful services that, for instance, help customers with roadside assistance or fraud protection. Now the company says it will also end those sales in March.

The move follows a Tuesday report on Vice’s Motherboard site that showed how bounty hunters can track phone locations using carrier data.

Oregon Sen. Ron Wyden has been pushing mobile providers to end location-data sales. He said Thursday that Congress needs to pass legislation to ensure they come to a halt.