SK Telecom (SK텔레콤) is a company that specializes in the areas of mobile communications, media, security, commerce, and mobility. It is engaged in the commercial development and implementation of wireless and fixed-line technologies and services as well as its platforms. The company offers cellular services (including wireless voice and data transmission services, sales of wireless devices), fixed-line telecommunication services (fixed-line telephone, broadband Internet, advanced media platforms) and business communications services.