- Translation - AIS-CP 100/2008 August 20, 2008 Subject: Notification of the Book Closing for Interest Payment of Debentures of the Company (AIS093A and AIS093B) To: The President The Stock Exchange of Thailand Refer to: 1. The Letter NO. IVS.IB 08/2669 of TMB Bank Plc. on August 20, 2008 2. The Letter NO. IVS.IB 08/2673 of TMB Bank Plc. on August 20, 2008 Advanced Info Service Public Company Limited would like to inform you that the Company will close the registered book for interest payment of debentures of the Company (AIS093A and AIS093B), the details are shown in the referenced letter. Please be informed accordingly. Sincerely Yours, (Signed) Mr. Pong-amorn Nimpoonsawat Chief Finance Officer Advanced Info Service Plc. Compliance Department Tel. 0-2687-4278, 0-2615-3277 Referenced Letter No. 1 IVS.IB.08/2669 August 20, 2008 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS093A Dear Sir, We, TMB BANK Public Company Limited. As a Registrar & Paying Agent Debentures of ADVANCED INFO SERVICE PUBLIC COMPANY LIMITED NO.1/2002, DUE 2009 would like to announce that the registered book of AIS093A will be closed from 12.00 on September 8, 2008 for the right to receive the interest for the period # 13. AIS093A will be paid the interest on September 22, 2008 with interest rate 6.25 % from the period of March 21, 2008 to September 20, 2008 for 184 days. Yours faithfully, (Mr.Apichart Watanaphusitsagul) Authorized Signature Registrar and Paying Agent Investment Services Operations Division Tel. 0-2230-6061,0-2230-5731 Referenced Letter No. 2 IVS.IB.08/2673 August 20, 2008 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS093B Dear Sir, We, TMB BANK Public Company Limited. As a Registrar & Paying Agent Debentures of ADVANCED INFO SERVICE PUBLIC COMPANY LIMITED NO.2/2002, DUE 2009 would like to announce that the registered book of AIS093B will be closed from 12.00 on September 8, 2008 for the right to receive the interest for the period # 13. AIS093B will be paid the interest on September 22, 2008 with interest rate 4.35 % from the period of March 21, 2008 to September 20, 2008 for 184 days and principal repayment at THB. 166.6667 per unit Yours faithfully, (Mr.Apichart Watanaphusitsagul) Authorized Signature Registrar and Paying Agent Investment Services Operations Division Tel. 0-2230-6061,0-2230-5731