- Translation - AIS-CP 082/2009 September 21, 2009 Subject: Notification of the record date and book closing date for interest payment of the Company's debentures AIS127A and AIS141A To: The President The Stock Exchange of Thailand Refer: 1. The Letter No. SSO.SS&IB0.09/4676 of Thai Military Bank Plc., dated September 21, 2009 2. The Letter No. SSO.SS&IBO.09/4677 of Thai Military Bank Plc., dated September 21, 2009 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 AIS141A, the details are shown in the reference letters. Please be informed accordingly, Yours faithfully, -signed- Mr. Vikrom Sriprataks Director Advanced Info Service Plc. Reference 1 SSO.SS&IBO.09/4676 September 21, 2009 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 3rd interest payment on October 8, 2009 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 October 9, 2009. The interest payment will be made on October 26, 2009 with interest rate of 4.00 % per annum from the period of July 23, 2009 to October 22, 2009 or 92 days of interest period. Yours faithfully, Poonsri Solgosoom (Ms.) Authorized Signature Registrar and Paying Agent Securities Services and Investment Banking Operations Department Tel. 0-2230-6061,0-2230-5731 Reference 2 SSO.SS&IBO.09/4677 September 21, 2009 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 3rd interest payment on October 8, 2009 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 October 9, 2009. The interest payment will be made on October 26, 2009 with interest rate of 4.00 % per annum from the period of July 23, 2009 to October 22, 2009 or 92 days of interest period. Yours faithfully, Poonsri Solgosoom (Ms.) Authorized Signature Registrar and Paying Agent Securities Services and Investment Banking Operations Department Tel. 0-2230-6061,0-2230-5731