- Translation - AIS-CP 024/2010 March 11, 2010 Subject: Notification of the record date and book closing date for interest payment of the Company's debentures AIS127A, AIS141A To: The President The Stock Exchange of Thailand Refer: 1. The Letter No. SSO.SSFO.10/1151 of Thai Military Bank Plc., dated March 11, 2010 2. The Letter No. SSO.SSFO.10/1152 of Thai Military Bank Plc., dated March 11, 2010 Advanced Info Service Public Company Limited ("the Company") would like to inform you the Record date and the book closing date for interest payment of the Company's debentures, AIS127A and AIS141, the details are shown in the reference letters. Please be informed accordingly, Yours faithfully, -signed- Mr. Pong-amorn Nimpoonsawat Chief Finance Officer Advanced Info Service Plc. Reference 1 SSO.SSFO.10/1151 March 11, 2010 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS127A Dear Sir, We, TMB Bank Public Company Limited, as a Registrar & Paying Agent of Debentures of Advanced Info Service Public Company Limited No.1/2009 Series 1 Due 2012 would like to inform the record date of the debenture, AIS127A, to determine the right to receive the 5th interest payment on April 8, 2010 and the closing date of the registered book for gathering the debenture holders, names under the Section 225 of the Securities and Exchange Act B.E.2535 will be on April 9, 2010. The interest payment will be made on April 23, 2010 with interest rate of 4.00 % per annum from the period of January 23, 2010 to April 22, 2010 or 90 days of interest period. Yours faithfully, TMB Bank Public Company Limited (Mr.Apichart Watanaphusitsagul ) (Mr.Anan Vattanarongkupt) As the Registrar and Paying Agent Securities Services and Fund Operations Tel. 0-2230-6061,0-2230-5731 Reference 2 SSO.SSFO.10/1152 March 11, 2010 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS141A Dear Sir, We, TMB Bank Public Company Limited, as a Registrar & Paying Agent of Debentures of Advanced Info Service Public Company Limited No.1/2009 Series 2 Due 2014 would like to inform the record date of the debenture, AIS141A, to determine the right to receive the 5th interest payment on April 8, 2010 and the closing date of the registered book for gathering the debenture holders, names under the Section 225 of the Securities and Exchange Act B.E.2535 will be on April 9, 2010 The interest payment will be made on April 23, 2010 with interest rate of 4.00 % per annum from the period of January 23, 2010 to April 22, 2010 or 90 days of interest period. Yours faithfully, TMB Bank Public Company Limited (Mr.Apichart Watanaphusitsagul ) (Mr.Anan Vattanarongkupt) As the Registrar and Paying Agent Securities Services and Fund Operations Tel. 0-2230-6061,0-2230-5731