South Korea's SK Telecom has demonstrated the LTE-Advanced service that offers up to 225Mbps of speed by aggregating 20MHz bandwidth in 1.8GHz band and 10MHz bandwidth in 800MHz band.

The company said that it expects to launch the ‘20MHz+10MHz’ LTE-Advanced service nationwide through smartphones in the second half of 2014 as the smartphone chipset that supports 225 Mbps of speeds is currently being developed.

LTE can offer up to 150Mbps of speeds using a maximum of 20MHz of continuous spectrum in one band, while LTE-Advanced can support speeds over 150Mbps by combining different bands through Carrier Aggregation (CA).

In June 2013, SK Telecom has commercialized LTE-Advanced service using 10MHz bandwidth in 1.8GHz band and 10MHz bandwidth in 800MHz band. On August 30, 2013, SK Telecom has gained authorization to operate the 35 MHz bandwidth (20 downlink + 15 uplink) in 1.8GHz band, and immediately launched measures to strengthen both its LTE and LTE-Advanced services by utilizing the newly acquired bandwidth.