Nope, not t mobile ...Sounds like you switched to Tmobile? If so, good choice. I've been with them 11 years with thousands of dollars of concessions on their part (overage write offs, free phones, etc) just to keep my business. They have less concessions these days but with the lowest rates in the market & good quality service (I'm in the South Florida market), I have felt no need for any.
Finally went with my company and saved big time ....
Reason I stuck with Sprint for so long was for the most part everything I was doing with my phone worked fine ....
Then the 4G issues came up and they have finally got 1 tower in town that does 4G but mine does not .... i have been told from those guys that the 4G tower would be up and running for me for 2 years now.