¿Hace cuánto tiempo eres cliente de T-Mobile?

I have been with T-Mobile since they started off as Voice Stream.  We also had Sprint, Verizon, AT&T, and Nextel.  Stuff hit the fan with Sprint after they merged Sprint with Nextel.  So the company I used to work for(retired from DoD finally) no longer will touch Sprint and hopes One of the three carriers eat them up and replace their whole upper management.