If apple only gives sprint the iphone 5....I'm done with them.
Sure you are.
But then why would Sprint to release a device on WiMAX, one that would have sizable traction, while they are actively trying to transition their customers to LTE? (supposing that 2 years is how long it would take, but i personally believe that we will see Sprint releasing LTE phones much sooner)
I don't think it makes any sense to invest in R&D and make multiple device configurations if one of them (WiMAX) is a standard nobody plans on keeping around much longer. I'd rather beleive there won't be any 4G technologies on whatever comes out tomorrow, but it will be on offered on Sprint.
I don't see Sprint actively transitioning to LTE for at least 2 years. They first need to get rid of iden completely which will happen most likely next year. Remember, their plan is to have LTE on the iden spectrum which would be great because of it's high building penetration.