AIS-CP 064/2007 June 21, 2007 Subject: Additional notification of investment in Bridge Mobile Pte Ltd. - Singapore To: The President The Stock Exchange of Thailand Refer to: The Letter No. AIS-CP 063/2007 on June 18, 2007. Re: Execution of Joint Venture Agreement in Bridge Mobile Pte Ltd. - Singapore According to the referred letter, Advanced Info Service Public Company Limited (the "Company" or "ADVANC") would like to file additional information of the investment in Bridge Mobile Pte Ltd. - Singapore ("Bridge") as follows: 1.The Company will invest in Bridge approximately $2.7 million or approximately 2.2 million shares; 2.Partnership of Bridge comprises of 10 leading mobile operators in Asia- Pacific, namely Bharti Aritel (India), CSL (Hong Kong), Globe Telecom (Philippines), Maxis (Malaysia), SingTel Mobile (Singapore), SingTel Optus (Australia), SK Telecom (Korea), Taiwan Mobile (Taiwan), Telkomsel (Indonesia) and ADVANC (Thailand) each investing 10% stake. Yours faithfully, (Singed) Mr. Pong-Amorn Nimpoonsawat Chief Finance Officer Advanced Info Service Plc.