KT Corporation - ADR operates in the Telephone communications, exc. radio sector. KT Corporation is a Korean-based company engaged in the provision of integrated telecommunications services. The Company's services are divided into five categories. Its Internet service provides high-speed Internet, Internet data center (IDC), Internet protocol television (IPTV) and other services under the brand names of olleh Internet and olleh TV. Its Data service provides leased lines for data communications. Its Telephone service provides wired telephones and others. Its Wireless service provides wireless telephones and others. Its Products Sales service provides mobile phone terminals under the brand name olleh Mobile. As of December 31, 2010, the Company had 30 domestic affiliated companies, as well as nine overseas affiliated companies in the United States, Japan, China, Vietnam, Mongolia and others.