Initially founded as a registered company, advance the four service co., Ltd. on April 24 2529 (1986) [7] first opening its doors in October 2533 (1990) by AIs to contract with the telephone organization of Thailand, Thai action project, 900 MHz mobile phone system service for a period of 20 years up to 2553 (2010)AIS are listed on the stock exchange, Thai. On November 13 to become a public company and 2534 (1991) Thereafter, the company expanded by acquisition of Freecom, Shinawatra's Shinawatra company da (current advance is da ta network. At chan limited), Shinawatra paging, etc. The company launched a mobile service in GSM system On the name Digital GSM in October 2537 (1994) and extend the joint contract is 25 years old (out of 2558 (2015) contract) when the current League and withit 2539 (1996) nut Phong is Chairman of the Board of Directors and a bolt of lightning striking the clouds as Chief Executive Officer.
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