Question [Q] T-Mobile Wi-fi calling on 4.4 Roms (GE and Sense based)

Checked around, searched but couldn't come up with anything conclusive. I live a bit out in the sticks so I need wi-fi calling to keep getting texts/calls. I'm jumping from at&t to t-mobile.

From what I've gathered, tmo wi-fi calling won't work on GE based roms, only Sense. Yet I've read that changing the radio will work. Is this true? Has anyone accomplished that?