- Translation - AIS-CP 016/2005 February 21, 2005 Re: Notification of the Book Closing for Interest Payment of Debentures of the Company (AIS093A, AIS093B, AIS073A, AIS063A) To: The President The Stock Exchange of Thailand Refer to: 1.The Letter No. IVS 05/0279 of Thai Military Bank Plc. on February 18, 2005 2.The Letter No. IVS 05/0283 of Thai Military Bank Plc. on February 18, 2005 3.The Letter No. IVS 05/0275 of Thai Military Bank Plc. on February 18, 2005 4.The Letter No. IVS 05/0291 of Thai Military Bank Plc. on February 21, 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 of debentures of the Company (AIS093A, AIS093B, AIS073A, 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.05/0279 February 18, 2005 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS093A Dear Sir, We, THAI MILITARY BANK Plc. 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, 2005 for the right to receive the interest AIS093A will be paid the interest on March 21, 2005 with interest rate 6.25 % from the period of September 21, 2004 to March 20, 2005 for 181 days. Yours faithfully, (Klairoong Tamanakijprasart) Manager IVS & IB Ops. Department Registrar & Paying Agent IVS & IB Ops. Department Tel. 0-2230-5575, 0-2230-5487 IVS 05/0283 February 18, 2005 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS093B Dear Sir, We, THAI MILITARY 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 7, 2005 for the right to receive the interest.AIS093B will be paid the interest on March 21, 2005 with interest rate 3.100 % from the period of September 21, 2004 to March 20, 2005 for 181 days. Yours faithfully, (Klairoong Tamanakijprasart) Manager IVS & IB Ops Department Registrar & Paying Agent IVS & IB Ops Department Tel. 0-2230-5575, 0-2230-5487 IVS 05/0275 February 18, 2005 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS073A Dear Sir, We, THAI MILITARY BANK Pcl. 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, 2005 for the right to receive the interest. AIS073A will be paid the interest on March 21, 2005 with interest rate 5.25 % from the period of December 21, 2004 to March 20, 2005 for 90 days. Yours faithfully, (Klairoong Tamanakijprasart) Manager IVS & IB Ops. Department Registrar & Paying Agent IVS & IB Ops. Department Tel. 0-2230-5575, 0-2230-5487 IVS.05/0291 February 21, 2005 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS063A Dear Sir, We, THAI MILITARY 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, 2005 for the right to receive the interest. AIS063A will be paid the interest on March 23, 2005 with interest rate 5.30 % from the period of September 23, 2004 to March 22, 2005 for 181 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