How to install wimax on iphone 5?

I live in columbus ohio and i heard we r not getting 4glte until 2014 is there any way to get 4g wimax on iPhone 5 with sprint… Is there a case i can use to get 4g wimax or a hardwire i can install myself… Anything at all i just want to pay extra i already pay sprint and don't get 4glte. I don't wanna have to keep paying on something like freedompop after 1gb $10 per gigabyte

The iPhone 5 is a 4G LTE device.

There's no way to make it use Sprint's WiMax network.