Default [Q] 7105T for t mobile?

Hi All,
I'm a noob and need some serious help. I have a 7105T that I'd like to use for t-mobile. I need to use wifi calling and would like to have 4g lte reception. What rom would I have to use to do this? I would like to use jedi x19 but I'm not even sure I need a rom. I unrooted my phone currently and have jedi x on it but no wifi calling. Please help. Thanks all.