- Translation - AIS-CP 018/2007 February 7, 2008 Subject: Notification of the Book Closing for Interest Payment of Debentures of the Company (AIS099A, AIS119A and AIS139A) To: The President The Stock Exchange of Thailand Refer to: 1. The Letter NO. IVS.IB 08/0457 of TMB Bank Plc. on February 6, 2008 2. The Letter NO. IVS.IB 08/0459 of TMB Bank Plc. on February 6, 2008 3. The Letter NO. IVS.IB 08/0461 of TMB Bank Plc. on February 6, 2008 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 (AIS099A, AIS119A and AIS139A), the detail 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 No. 1 IVS.IB 08/0457 February 6, 2008 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS099A Dear Sir, We, TMB BANK Public Company Limited. As a Registrar & Paying Agent Debentures of ADVANCED INFO SERVICE PUBLIC COMPANY LIMITED NO.1/2006, SERIES 1 DUE 2009 would like to announce that the registered book of AIS099A will be closed from 12.00 on February 22, 2008 for the right to receive the interest for the period # 3. AIS099A will be paid the interest on March 7, 2008 with interest rate 5.80 % from the period of September 7, 2007 to March 6, 2008 for 182 days. Yours faithfully, (Miss.Poonsri Solgosoom) Authorized Signature Registrar and Paying Agent IVS & IB Tel. 0-2230-6203, 0-2230-5487 Referenced Letter No. 2 IVS.IB 08/0459 February 6, 2008 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS119A Dear Sir, We, TMB BANK Public Company Limited. As a Registrar & Paying Agent Debentures of ADVANCED INFO SERVICE PUBLIC COMPANY LIMITED NO.1/2006, SERIES 2 DUE 2011 would like to announce that the registered book of AIS119A will be closed from 12.00 on February 22, 2008 for the right to receive the interest for the period # 3. AIS119A will be paid the interest on March 7, 2008 with interest rate 5.90 % from the period of September 7, 2007 to March 6, 2008 for 182 days. Yours faithfully, (Miss.Poonsri Solgosoom) Authorized Signature Registrar and Paying Agent IVS & IB Tel. 0-2230-6203, 0-2230-5487 Referenced Letter No. 3 IVS.IB 08/0461 February 6, 2008 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Scheduled closing the registered book for AIS139A Dear Sir, We, TMB BANK Public Company Limited. As a Registrar & Paying Agent Debentures of ADVANCED INFO SERVICE PUBLIC COMPANY LIMITED NO.1/2006, SERIES 3 DUE 2013 would like to announce that the registered book of AIS139A will be closed from 12.00 on February 22, 2008 for the right to receive the interest for the period # 3. AIS139A will be paid the interest on March 7, 2008 with interest rate 6.00 % from the period of September 7, 2007 to March 6, 2008 for 182 days. Yours faithfully, (Miss.Poonsri Solgosoom) Authorized Signature Registrar and Paying Agent IVS & IB Tel. 0-2230-6203, 0-2230-5487