Advanced Info Service Public Co., via its subsidiaries, is engaged in the operation of a 900 MHz cellular telephone system, the acting as a service provider of online data communications service via telephone land lineand optical fiber and service provider of call center and service provider of digital mobile phone network; distributor of cash card business; service provider of electronic payment and cash card; service provider of international telephone service/gateway; andservice provider of cellular telephone network in 2.1-GHz and 1800MHz frequency. As of Dec 31 2015, Co. had three segments: mobile phone and call center services; mobile phone sales; and datanet and broadband services.
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