- Translation - AIS-CP 093/2004 July 30, 2004 Re: Notification of the Book Closing for Interest Payment of Debentures of the Company (AIS06NA) To: The President The Stock Exchange of Thailand Refer to: The Letter No. IVS 04/1289 of DBS THAI DANU BANK on July 29, 2004 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 (AIS06NA), 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 Group Compliance Tel. (02) 299-5552 Referenced Letter IVS 04/1289 July 29, 2004 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS06NA Dear Sir, We, DBS THAIDANU BANK As a Registrar & Paying Agent Debentures of ADVANCED INFO SERVICE PUBLIC COMPANY LIMITED NO.3/2001, DUE 2006 would like to announce that the registered book of AIS06NA will be closed from 12.00 on August 16, 2004 for the right to receive the interest. AIS06NA will be paid the interest on August 30, 2004 with interest rate 5.85 % from the period of May 28, 2004 to August 27, 2004 for 92 days. Yours faithfully, (Klairoong Tamanakijprasart) Manager IVS Operations Department Registrar & Paying Agent IVS Operations Department Tel. 0-2230-5575, 0-2230-5487 IVS 04/0281 2