The Communications Workers of America have complained to the National Labor Relations Board that T-Mobile has formed a company-controlled union in efforts to marginalize their efforts to unionize. Despite the illegal nature of this practice in the United States, T-Mobile formed “T-Voice”, which is made up of employee representatives. The wireless communications company is allegedly using this “sham union” to receive intel on employee desires and rollout new perks in an effort to diminish the need for the CWA to unionize the company.
See "T-Mobile Accused of Fighting a Real Union by Creating a Fake One", Josh Eidelson, Bloomberg, April 28, 2016