- Translation - AIS-CP 027/2006 February 21, 2006 Subject: 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 06/0512 of Thai Military Bank Plc. on February 20, 2006 2. The Letter No. IVS 06/0508 of Thai Military Bank Plc. on February 20, 2006 3. The Letter No. IVS 06/0516 of Thai Military Bank Plc. on February 20, 2006 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. Ops. 06/0512 February 20, 2006 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 March 7, 2006 for the right to receive the interest for the period # 16. AIS073A will be paid the interest on March 21, 2006 with interest rate 5.25 % from the period of December 21, 2005 to March 20, 2006 for 90 days. Yours faithfully, TMB Bank Public Company Limited. (Mrs. Metinee Chiencharoentanakit) Authorized Signature Registrar and Paying Agent IVS & IB Ops. Department Tel. 0-2230-5575, 0-2230-5487 IVS. Ops. 06/0508 February 20, 2006 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 March 7, 2006 for the right to receive the interest for the period # 8. AIS093A will be paid the interest on March 21, 2006 with interest rate 6.25 % from the period of September 21, 2005 to March 20, 2006 for 181 days. Yours faithfully, TMB Bank Public Company Limited. (Mrs. Metinee Chiencharoentanakit) Authorized Signature Registrar and Paying Agent IVS & IB Ops. Department Tel. 0-2230-5575, 0-2230-5487 IVS. Ops. 06/0516 February 20, 2006 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 March 7, 2006 for the right to receive the interest for the period # 8. AIS093B will be paid the interest on March 21, 2006 with interest rate 4.100 % from the period of September 21, 2005 to March 20, 2006 for 181 days. Yours faithfully, TMB Bank Public Company Limited. (Mrs. Metinee Chiencharoentanakit ) Authorized Signature Registrar and Paying Agent IVS & IB Ops Department Tel. 0-2230-5575, 0-2230-5487