3G Vs 4G

Mobile workers who need always-on Internet access -- and who don't want to rely on public Wi-Fi hot spots -- often turn to a cellular network for connectivity, using either a 3G-equipped notebook or an external 3G modem. Now carriers are touting faster fourth-generation wireless networks as the next phase of mobile computing. But to make use of the new networks, you have to buy a 4G-capable device or modem and a new, often more-expensive service plan.

Is it worth the hassle and expense of upgrading to 4G? To answer that question, I pitted Sprint's WiMax service -- the first 4G service available in the New York metropolitan area, where I live -- against its 3G network in a series of real-world tests

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wtf, people already gone to 4G ?

Other countries are already thinking about 4G, we are yet to start.