The mmWave system will allow the two companies to realize dramatically enhanced data transmission speeds; test, verify and improve wireless transmission performance between base station and handset; and review the possibility of applying mmWave technologies in the downtown areas. As one of the key 5G enabling technologies, mmWave technology uses 30GHz or higher frequency bands to deliver significantly faster data transmission speeds. Due to saturation and fragmentation of frequency bands below 6GHz being used today for mobile telecommunications, mobile operators expect mmWave technologies that allow for the utilization of wide bandwidth in the higher frequency bands to help them open the 5G era earlier. SK Telecom and Samsung Electronics have been working together since October 2014 to develop technologies that will enable the use of spectrum above 6GHz, which were considered to be difficult to use for cellular communications due to high propagation loss.