Cautious, not be trolling you, but, list your issue and what you have tried and are trying to do to correct it.
Basically, flashed to Boost Mobile and don't have 4G working, correct?
If I recall, this one is outside what I know, however, I'm interested to know the correction as well just to tuck away for future knowledge.
If I helped, please hit that little ol' "Thanks" button
Evo 3D, ENG HBOOT, S-OFF, ROM...Yes...
Other Devices Rooted:
Evo 4G (3 different ones)
Samsung Capitvate (Galaxy S)
iPhone 3G, crushed under car seat
Blackberry Curve, it's a Blackberry...
HTC Pure (Topaz), went through 5 in 11 months, thank you WM 6.5, nuff said
HTC Aria, broke screen