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My previous column on the limitations of WiMax.

Another view of the Sprint-Nextel challenge.

Here's a back-of-the-envelope analysis that says Sprint will have to convert only a small portion of its existing customer base for WiMax to easily pay for itself.

More than you probably want to know about Personal Communications Service (PCS), which looks like it could have been designed with WiMax in mind.

Here's MMDS, the previous wireless standard that failed.