Specifically, the letters claimed to be from T-Mobile's Legal and Emergency Response Team. They began by saying that T-Mobile's systems had identified online activity that bordered on illegal, originating from one of the lines on the accounts. The activity fell into one of two categories: visiting websites promoting hacking or containing inappropriate, age-restricted content.The letter informed recipients that their online behavior violated the company's Terms of Service, and while they weren't being penalized at that time, the identified websites would be blocked by "T-Mobile" for all customers. Furthermore, users were warned that they would be subject to increased monitoring to ensure compliance. The letters ended with a warning that veering into unlawful territory could not only get their account terminated but might also invite legal action.The sender signed off with a seemingly legitimate T-Mobile address. Customers who received the letters were understandably unsettled. The letter was shared online, prompting some customers to wonder if it had anything to do with T-Mobile's profiling activities. The company keeps tabs on interactions with potentially sketchy URLs. Many customers started considering VPNs to cover their tracks.The Mobile Report reached out to T-Mobile and was told that it never sent those letters. It also distanced itself from the policies outlined in the letter, clarifying that it didn't monitor or censor online activities. The company blocks access to known malicious websites, but that's standard practice across the industry and exists to keep users safe.