Default WiMax

I have the epic 4g touch with virgin mobile, the phone came with jellybean installed. I don't get Wimax with my plan on Virgin Mobile so i wanted to use the info in this thread to use freedompop for the 4g wimax

http://forum.xda-developers.com/show...447615&page=23


unfortunately since i got the phone with jb install, I'm not sure how to proceed; i basically get I'll have to root the phone, create a backup of my current setup; downgrade to a gb rom/ics rom do the work and than restore my backup and remove the root privileges. I don't want root because my work uses an app that doesn't start or work on phones that have been rooted.

I previously had an Optimus V that i did root however Samsung seems much complicated especially since their are many carrier versions of this phone, and multiple things such as odin ect if you guys could help me in any way; I'd appreciate it.