SK Telecom Co., Ltd. provides wireless telecommunications services in Korea. The company offers cellular voice services, including wireless voice transmission and related value-added services; wireless global roaming services; and interconnection services to connect its networks to fixed-line and other wireless networks. The company also provides wireless data communication services that allow subscribers to send and receive text and multimedia messages; and wireless Internet access services. In addition, it offers broadband Internet access and other Internet-related services, including video-on-demand and Internet protocol TV services; and and fixed-line telephone services, such as local, and domestic and international long-distance, and voice over Internet protocol services to residential and commercial subscribers. Further, the company provides international telecommunications services, such as direct-dial; pre and post paid card calling services; bundled services for corporate customers; voice services using Internet protocol; Web-to-phone services; and data services. Additionally, it operates NATE-ON, an instant messaging service for NATE users; 11th Street, an online shopping mall; T Store, an online open marketplace for mobile applications; Syrup, a mobile wallet service; T-Map navigation service; and Hoppin, a network-based personalized media platform, as well as provides NATE.com portal services that offers various content and services. The company also offers customized business solutions and applications to corporate customers; smart beams, smart speakers, and other audio products; and social networking services. As of December 31, 2014, it had 28.6 million wireless subscribers. The company was formerly known as Korea Mobile Telecommunications Co., Ltd. and changed its name to SK Telecom Co., Ltd. in March 1997. SK Telecom Co., Ltd. was founded in 1984 and is headquartered in Seoul, South Korea.