VoIP use on a mobile broadband device is both an opportunity and a concern for the global telecommunications market. Proponents are looking for ways to lower customer costs associated with voice and data services.
The South Korean government is considering permitting voice communication over broadband wireless networks. Officials have expressed concern that the WiMAX-powered WiBro service has not exceeded subscriber adoption goals due to a lack of "killer application
WiBro operators KT and SK Telecom could find themselves mobile virtual network operators (MVNOs) as soon as this year if the proposal gains government approval.
Both KT and SK telecom use the 2.3GHz Mobile Wimax spectrum, Same as Seven bought of Unwired so there should be devices, or we need now is a Wimax rollout
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