SK Telecom Co., Ltd. (Hangul: SK텔레콤 or 에스케이텔레콤)is a South Korean wireless telecommunications operator, controlled by the SK Group, one of the country's largest chaebol. As a part of SK Group, SK stands for Sun Kyung.
SK Telecom is a provider of mobile service in Korea, with 50.5% of the market share as of 2008. Since being established on March 29, 1984 the company evolved from a first generation analogue cellular system, to second generation CDMA, then to the world's first third generation synchronized IMT-2000 cellular system. SK Telecom also became the world’s first to commercialize HSDPA in May, 2006.
The company’s current services include NATE, a wired and wireless integrated multi-Internet service, June, a multimedia service, MONETA, a financial service, Telematic service such as NATE Drive and even Digital Home service. In 2004, SK Telecom launched Hanbyul, the world’s first DMB satellite. The carrier currently provides satellite DMB to its subscribers through its subsidiary TU Media Corp. SK Telecom also offers a variety of internet services, many through its subsidiary SK Communications. Cyworld is one of the most popular blogging services in South Korea and NateOn is one of the most popular instant messengers.