出典:Wikipedia
出典:『Wikipedia』 (2011/04/30 03:55 UTC 版)
Advanced Info Service PCL is Thailand's largest GSM mobile phone operator with 28.8 million customers as of February 2010. Founded in April 1986, AIS started off as a computer rental business. In October 1990, it launched analog 900 MHz mobile phone services with a 20 year monopoly concession from the Telephone Organization of Thailand, and later became the first company allowed to operate on the GSM 900 frequency. Followed by acquiring Shinawatra Paging in June 1992. The highly profitable company is controlled by the Shin Corporation, headed by Temasek Holdings, a Singapore government owned agency. AIS is listed on the Stock Exchange of Thailand on November 5, 1991. Singapore Telecommunications holds a 19.15% stake in the company.