I guess CDMA is good because at least these phones will have 3g when 4g WiMax is not offered and LTE is not available on these phones?
I have done a lot of searching and found nothing that hinted that the Sprint GS II Epic 4g touch has both LTE and WiMax capabilities. So it seems, if on Sprint, now is the worst time to upgrade to a two year contract on a phone that will not handle Sprints new 4G network next year.
I'll wait for a LTE/WiMax capable phone, or just switch to Verizon when my EVO contract is up next August and not worry about it. At least by next August we will have a better idea how the Sprint network upgrade is going. If they are pushing back upgrade dates and a revised schedule says 2013, it will be time to move on.