“I write you today to express my disappointment and disbelief regarding T-Mobile’s continued partnership with companies that have enabled spying on Americans without their knowledge and consent,” the Senator said. “Your company’s continued sale of customer location data to these so-called ‘location aggregators’ is in direct contradiction to your ‘personal evaluation’ of the issue six months ago.”

In the wake of Motherboard’s reporting, numerous wireless carriers have promised to discontinue the sale of such data to third party aggregators and data brokers. Legere has subsequently promised to end the practice entirely by March. The problem: the lack of carrier transparency and government apathy traditionally makes verification difficult. Wyden said he was “shocked” by the Motherboard investigation showcasing how the CEO had yet to take meaningful action on this front. By the time T-Mobile acts, the Senator complained, it will have been nine months since Legere’s original Twitter promise. “T-Mobile calls itself the ‘Uncarrier,’” Wyden said. “To that end I urge you to immediately ‘uncarry’ the ability of stalkers and middlemen to purchase your customers location information.”