Galaxy S5 Active - Enable band 4 ( aws )

I'm looking at buying an S5 Active to use on T-Mobile. I've spent a couple hours of searching, but i've been unable to find any instructions on how to enable the tmobile data band on the phone. Does anyone know of a way to do this?

Here are some instructions for enabling the aws band on the S4.. Has a similar approach been formulated for the s5 active?
http://forum.xda-developers.com/show....php?t=2373003