Edited sentence: However, in 2012 - when license for 2.3Ghz expires, there is a rumor that SK will dump WiBro system and move on to LTE.KT has formerly upgraded its network bandwidth to 10Mhz from 8.75Mhz.KT promised to expand coverages and maintain their WiBro network as 3W (WiBro, Wi-Fi, WCDMA) plan.KT will continually build and upgrade WiBro.SK is not interested in WiBro.SK still uses 8.75Mhz bandwidth on 2.3Ghz frequency.Their coverage is limited to Seoul area and few hot spots over the nation