[Mutiny32]

Sprint's 4G wireless infrastructure has been in place nationwide for some time now. The reason why they're slowly turning it on is because they do things the right way with their network (unlike other US carriers); they are making sure backhaul is in place before they flip it on.

This is why all of the other carriers are so far behind them in 4G rollout. Sprint had three companies implement WiMax in the US to speed the buildout. Now they are already ahead of all the other carriers because if they wanted to go live with 4G today, they could. But now they are waiting on the implementation of higher-speed links to towers so they can handle the increased bandwidth usage.