Student Research Question

Hello all,

Economics student and proud T-Mobile customer here. I'm working on a research project for the Fall semester. I'm studying the telecommunications market. Specifically, I'm looking at the big 4 (AT&T, Verizon, Sprint, and T-Mobile) and analyzing their market power.

A component of my research is finding out how many offices are used by each of the carriers. I was hoping someone on the subreddit would be able to help me out. I'm looking for the number of regional offices used by T-Mobile.

I know from looking at the company's 10k that they lease 950,000 square feet of office space for their main corporate office. They also lease an additional 1.2 million square feet for regional offices. However, I was unable to find the number of offices leased by T-Mobile. Does anyone happen to know how many regional and/or corporate offices T-Mobile has?

Thanks everyone!