- Translation - AIS-CP 100/2009 December 22, 2009 Subject: Notification of the record date and book closing date for interest payment of the Company's debentures AIS127A, AIS141A, AIS134A To: The President The Stock Exchange of Thailand Refer: 1. The Letter No. SSO.SSF0.09/10021 of Thai Military Bank Plc., dated December 21, 2009 2. The Letter No. SSO.SSF0.09/10022 of Thai Military Bank Plc., dated December 21, 2009 3. The Letter No. SSO.SSF0.09/10023 of Thai Military Bank Plc., dated December 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, AIS141A and AIS134A, 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.09/10021 December 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 4th interest payment on January 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 January 11, 2010. The interest payment will be made on January 25, 2010 with interest rate of 4.00 % per annum from the period of October 23, 2009 to January 22, 2010 or 92 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.09/10022 December 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 4th interest payment on January 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 January 11, 2010 The interest payment will be made on January 25, 2010 with interest rate of 4.00 % per annum from the period of October 23, 2009 to January 22, 2010 or 92 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 3 SSO.SSFO.09/10023 December 21, 2009 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS134A Dear Sir, We, TMB BANK Public Company Limited. As a Registrar & Paying Agent Debentures of ADVANCED INFO SERVICE PUBLIC COMPANY LIMITED NO.1/2008, DUE 2013 would like to announce that the registered book of AIS134A will be closed on January 18, 2010 for the right to receive the interest for the period # 7. AIS134A will be paid the interest on February 01, 2010 with interest rate 4.00 % from the period of October 30, 2009 to January 29, 2010 for 92 days. 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