Sprint does not have a 4G network, their supposed 4G network is nothing more than an enhanced 3G network that hardly has any coverage areas. And when 4G goes full steam ahead, trust me these carriers will charge you for that extra bandwidth that you will be using on a monthly basis, if you think they won't, I suggest you crawl out under that rock.
obviously you know what your talking about because the big hype over the evo is that it is the first WiMaX phone....look it up lowest speeds should be over 1 mbits dude....FYI I work for comcast so this clearwire/sprint wimax thing is in my neighborhood!!! dont spread bad information!!! it all depends on range and how far deployed it is