Possible to run 4G radio only?

[JickBahTech]

Hey all. I'm a long time lurker from the WinMo forums.

I just got an Epic 4G to play with, and I know this is an EVO forum, but you guys are the only ones playing with 4G so I thought I'd ask this here.

In regards to battery life, this phone is barely making it through the day on 3G, and I have access to 4G, but when both radios are on it's not pretty. Has anyone found a way to run these phones on 4G only? I don't seem to have the ability to turn off the cell radio on this phone and use wifi only either. It seems to be a cell radio on or EVERYTHING off kind of device.

Any thoughts?