- Translation - CP- AIS 013/2004 February 20, 2004 Re: Notification of the Book Closing for Interest Payment of 4 Debentures of the Company (AIS063A, AIS073A, AIS093A and AIS093B) To: The President The Stock Exchange of Thailand Refer to: The Letter No. IVS 04/0279, 04/0281, 04/0283, and 04/0285 of DBS THAI DANU BANK on February 20, 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 four (4) debentures of the Company such as AIS063A, AIS073A, AIS093A and AIS093B, the details are shown in the referenced letter. Please be informed accordingly. Sincerely Yours, (Signed) Mr. Pong-Amorn Nimpoonsawat Chief Financial Officer Advanced Info Service Public Company Limited Group Compliance Tel. 0 2299 5561 Referenced Letters IVS 04/0285 February 20, 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 March 9, 2004 for the right to receive the interest. AIS063A will be paid the interest on March 23, 2004 with interest rate 5.30 % from the period of September 23, 2003 to March 22, 2004 for 182 days. IVS 04/0283 February 20, 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 March 8, 2004 for the right to receive the interest. AIS073A will be paid the interest on March 22, 2004 with interest rate 5.25 % from the period of December 21, 2003 to March 20, 2004 for 91 days. IVS 04/0279 February 20, 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 March 8, 2004 for the right to receive the interest. AIS093A will be paid the interest on March 22, 2004 with interest rate 6.25 % from the period of September 21, 2003 to March 20, 2004 for 182 days. IVS 04/0281 February 20, 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 March 8, 2004 for the right to receive the interest. AIS093B will be paid the interest on March 22, 2004 with interest rate 3.1625 % from the period of September 21, 2003 to March 20, 2004 for 182 days. Yours faithfully, -signed- (Klairoong Tamanakijprasart) Manager IVS Operations Department Registrar & Paying Agent IVS Operations Department Tel. 0-2230-5575, 0-2230-5487