Sprint Clearwire is expanding its WiMax wireless broadband network into several of the largest markets in the country.
Among the cities set to receive the wireless broadband service are New York, Los Angeles and the San Francisco Bay Area.
Additionally, the company hopes to expand its WiMax network, dubbed '4G', into the Denver, Cleveland, Miami and Cincinnati markets by the end of the year.
The WiMax format has long been in competition with Long Term Evolution (LTE) in the battle to succeed the current 3G wireless broadband platform.
Both formats have been labelled by telcos as '4G' wireless networks, but many in the industry have suggested that LTE looks to be headed towards victory in the marketplace.
Sprint Clearwire said that the firm offers WiMax services in 56 markets around the US.
Rival carrier Verizon has recently expanded its LTE network to dozens of US cities, and claims that its service now covers as many as 110 million Americans.
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