- Translation - AIS-CP 099/2005 August 25, 2005 Re: Notification of the Book Closing for Interest Payment and Principal Repayment of Debentures of the Company (AIS063A) To: The President The Stock Exchange of Thailand Refer to: The Letter No. IVS 05/1767 of TMB Bank Plc. on August 25, 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 and principal repayment of debentures of the Company (AIS063A), 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.05/1767 August 25, 2005 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS063A Dear Sir, We, TMB BANK Public Company Limited. As a Registrar & Paying Agent Debentures of ADVANCED INFO SERVICE PUBLIC COMPANY LIMITED NO.1/2001, DUE 2006 would like to announce that the registered book of AIS063A will be closed from 12.00 on September 9, 2005 for the right to receive the interest for the period # 9 and principal # 7. AIS063A will be paid the interest on September 23, 2005 with interest rate 5.30 % from the period of March 23, 2005 to September 22, 2005 for 184 days and principal repayment at THB 125 per unit. Yours faithfully, (Klairoong Tamanakijprasart) Manager IVS & IB Ops. Department Registrar & Paying Agent IVS & IB Ops. Department Tel. 0-2230-5575, 0-2230-5487