Wi-Fi Revolution? Not So Fast!

Disagreements over standards, rival technologies, and concerns about hotspot security are bringing the industry's hopes down to earth with a crash

It was meant to be the year of Wi-Fi "convergence." Beginning in 2006, mobile-phone users in large numbers would finally be able to use handsets to roam seamlessly between cell-phone networks and the wireless fidelity, or Wi-Fi, hotspots that provide high-speed Internet access. Handset maker Motorola and networking king Cisco last year announced a bold joint effort to develop the gear necessary for the union of the disparate networks.

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