- Translation - AIS-CP 077/2007 August 9, 2007 Re: Notification of the Book Closing for Interest Payment of Debentures of the Company (AIS099A, AIS119A and AIS139A) To: The President The Stock Exchange of Thailand Refer to: 1. The Letter NO. IVS.IB 07/3464 of TMB Bank Plc. on August 8, 2007 2. The Letter NO. IVS.IB 07/3466 of TMB Bank Plc. on August 8, 2007 3. The Letter NO. IVS.IB 07/3468 of TMB Bank Plc. on August 8, 2007 Advanced Info Service Public Company Limited ("the Company") would like to inform you that the Company will close the registered book for interest payment of debentures of the Company (AIS099A, AIS119A and AIS139A), the detail are shown in the referenced letter. Please be informed accordingly. Sincerely Yours, (Signed) Mr. Pong-Amorn Nimpoonsawat Chief Finance Officer Advanced Info Service Public Company Limited Referenced Letter No.1 IVS.IB 07/3464 August 8, 2007 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS099A Dear Sir, We, TMB BANK Public Company Limited. As a Registrar & Paying Agent Debentures of ADVANCED INFO SERVICE PUBLIC COMPANY LIMITED NO.1/2006, SERIES 1 DUE 2009 would like to announce that the registered book of AIS099A will be closed from 12.00 on August 24, 2007 for the right to receive the interest for the period # 2.AIS099A will be paid the interest on September 7, 2007 with interest rate 5.80 % from the period of March 7, 2007 to September 6, 2007 for 184 days. Yours faithfully, (Miss.Poonsri Solgosoom) Authorized Signature Registrar and Paying Agent IVS & IB Tel. 0-2230-6203, 0-2230-5487 Referenced Letter No.2 IVS.IB 07/3466 August 8, 2007 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS119A Dear Sir, We, TMB BANK Public Company Limited. As a Registrar & Paying Agent Debentures of ADVANCED INFO SERVICE PUBLIC COMPANY LIMITED NO.1/2006, SERIES 2 DUE 2011 would like to announce that the registered book of AIS119A will be closed from 12.00 on August 24, 2007 for the right to receive the interest for the period # 2.AIS119A will be paid the interest on September 7, 2007 with interest rate 5.90 % from the period of March 7, 2007 to September 6, 2007 for 184 days. Yours faithfully, (Miss.Poonsri Solgosoom) Authorized Signature Registrar and Paying Agent IVS & IB Tel. 0-2230-6203, 0-2230-5487 Referenced Letter No.3 IVS.IB 07/3468 August 8, 2007 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS139A Dear Sir, We, TMB BANK Public Company Limited. As a Registrar & Paying Agent Debentures of ADVANCED INFO SERVICE PUBLIC COMPANY LIMITED NO.1/2006, SERIES 3 DUE 2013 would like to announce that the registered book of AIS139A will be closed from 12.00 on August 24, 2007 for the right to receive the interest for the period # 2.AIS139A will be paid the interest on September 7, 2007 with interest rate 6.00 % from the period of March 7, 2007 to September 6, 2007 for 184 days. Yours faithfully, (Miss.Poonsri Solgosoom) Authorized Signature Registrar and Paying Agent IVS & IB Tel. 0-2230-6203, 0-2230-5487