- Translation - AIS-CP 097/2005 August 23, 2005 Re: Notification of the Book Closing for Interest Payment of Debentures of the Company (AIS073A, AIS093A, AIS093B) To: The President The Stock Exchange of Thailand Refer to: 1. The Letter No. IVS 05/1738 of Thai Military Bank Plc. on August 23, 2005 2. The Letter No. IVS 05/1730 of Thai Military Bank Plc. on August 23, 2005 3. The Letter No. IVS 05/1734 of Thai Military Bank Plc. on August 23, 2005 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 (AIS073A, AIS093A, 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 Public company Limited Referenced Letter IVS 05/1738 August 23, 2005 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS073A Dear Sir, We, TMB BANK Public Company Limited. As a Registrar & Paying Agent Debentures of ADVANCED INFO SERVICE PUBLIC COMPANY LIMITED NO.3/2002, DUE 2007 would like to announce that the registered book of AIS073A will be closed from 12.00 on September 7, 2005 for the right to receive the interest. AIS073A will be paid the interest on September 21, 2005 with interest rate 5.25 % from the period of June 21, 2005 to September 20, 2005 for 92 days. Yours faithfully, (Klairoong Tamanakijprasart) Manager IVS & IB Ops. Department Registrar & Paying Agent IVS & IB Ops. Department Tel. 0-2230-5575, 0-2230-5487 IVS.05/1730 August 23, 2005 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 7, 2005 for the right to receive the interest AIS093A will be paid the interest on September 21, 2005 with interest rate 6.25 % from the period of March 21, 2005 to September 20, 2005 for 184 days. Yours faithfully, (Klairoong Tamanakijprasart) Manager IVS & IB Ops. Department Registrar & Paying Agent IVS & IB Ops. Department Tel. 0-2230-5575, 0-2230-5487 IVS 05/1734 August 23, 2005 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 7, 2005 for the right to receive the interest. AIS093B will be paid the interest on September 21, 2005 with interest rate 3.100 % from the period of March 21, 2005 to September 20, 2005 for 184 days. Yours faithfully, (Klairoong Tamanakijprasart) Manager IVS & IB Ops Department Registrar & Paying Agent IVS & IB Ops Department Tel. 0-2230-5575, 0-2230-5487