Everyone internally knows it. Now the rest of the world is finding out as well: https://finance.yahoo.com/news/t-files-lawsuit-against-nad-162100639.html
“In the last four years, the National Advertising Division (NAD) has issued at least 16 decisions finding that T-Mobile's advertisements or other marketing claims were false, misleading and/or unsubstantiated.”
AT&T is pushing the T-Mobile lies narrative with Luke Wilson in a rural setting. The commercials are a direct response to the Billy Bob Thorton commercials from TMUS.
John Legere's lies also had indirect implications as Boost Mobile employees at the Sprint division spun off to Dish were later laid off when that company was unable to establish itself as a legitimate fourth national wireless carrier and was forced to divest its network assets in a massive sell-off!
The current enduring fraud began in 2019 when John Legere lied to Congress, a World-class bunch of liars:
"This merger is all about creating new, high-quality, high-paying jobs, and the New T-Mobile will be jobs-positive from Day One and every day thereafter. That’s not just a promise. That’s not just a commitment. It’s a fact".