- Translation - AIS-CP 102/2004 August 23, 2004 Re: Notification of the Book Closing for Interest Payment of Debentures of the Company (AIS073A, AIS093A, AIS093B and AIS063A) To: The President The Stock Exchange of Thailand Refer to: 1. The Letter No. IVS 04/1622, 04/1624, 04/ 1626 of DBS THAI DANU BANK on August 24, 2004 2. The Letter No. IVS 04/1628 of DBS THAI DANU BANK on August 26, 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 (AIS073A, AIS093A, AIS093B and 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 04/1622 August 24, 2004 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS093A Dear Sir, We, DBS THAIDANU BANK 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, 2004 for the right to receive the interest. AIS093A will be paid the interest on September 21, 2004 with interest rate 6.25 % from the period of March 21, 2004 to September 20,2004 for 184 days. Yours faithfully, (Klairoong Tamanakijprasart) Manager IVS Operations Department IVS 04/1624 August 24, 2004 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS093B Dear Sir, We, DBS THAIDANU BANK 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, 2004 for the right to receive the interest.AIS093B will be paid the interest on September 21, 2004 with interest rate 3.100 % from the period of March 21, 2004 to September 20,2004 for 184 days. Yours faithfully, (Klairoong Tamanakijprasart) Manager IVS Operations Department IVS 04/1626 August 24, 2004 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS073A Dear Sir, We, DBS THAIDANU BANK 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, 2004 for the right to receive the interest. AIS073A will be paid the interest on September 21, 2004 with interest rate 5.25 % from the period of June 21, 2004 to September 20,2004 for 92 days. Yours faithfully, (Klairoong Tamanakijprasart) Manager IVS Operations Department IVS 04/1628 August 26, 2004 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS063A Dear Sir, We, DBS THAIDANU BANK 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, 2004 for the right to receive the interest. AIS063A will be paid the interest on September 23, 2004 with interest rate 5.30 % from the period of March 23, 2004 to September 22, 2004 for 184 days and principal repayment at THB. 125 per unit. Yours faithfully, (Klairoong Tamanakijprasart) Manager IVS Operations Department