-Translation- AIS-CP 137/2006 October 30, 2006 Subject: Notification of the Book Closing for Interest Payment and Principal for the last period of Debentures of the Company (AIS06NA) To: The President The Stock Exchange of Thailand Refer to: The Letter No.ISO.ISIO.06/3381 of TMB Bank Plc. on October 27, 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 and principal for the last period of debenture of the Company (AIS06NA) for redemption and suspended trading of AIS06NA, the details are shown in the referenced letter. Please be informed accordingly. Yours faithfully, -Signed- Mr.Pong-Amorn Nimpoonsawat Chief Finance Officer Advanced Info Service Public Company Limited Reference Letter ISO.ISIO.06/3381 October 27, 2006 President The Stock Exchange of Thailand 62 Rachadapisek Road, Bangkok 10110 RE : Closing the registered book for redemption and suspended trading of AIS06NA We, TMB BANK Public Company Limited.,as a Registrar & Paying Agent of Debentures of ADVANCED INFO SERVICE PUBLIC COMPANY LIMITED NO.3/2001, DUE 2006 would like to announce that the registered book of redemption on AIS06NA will be closed from 12.00 on November 14, 2006 for the right to receive the interest and principal for the last period which will be paid on November 28, 2006 with interest rate 5.85 % from the period of August 28,2006 to November 27, 2006 for 92 days and principal repayment at THB.1,000.00 per unit.Therefore, to comply with the settlement and securities transfer system, AIS has asked the SET to suspend trading of AIS06NA effective between November 10, 2006 to November 28, 2006 and delisted from SET since November 29, 2006 onwards. The further details of the redemption are as follows; - In case that bondholders would like to redeem by themselves, they should contact Registrar at TMB Bank Plc. Silom Soi 7 Branch Computer Building 2nd Floor, Silom Road, Bangrak, Bangkok 10500 and will get principal and interest by cheque from 24-28 November, 2006 - In case that the redemption process was done by registered mail, bondholders should send their debenture certificates by registered mail to Registrar at TMB Bank Plc. Silom Soi 7 Branch Computer Building 2nd Floor, Silom Road, Bangrak, Bangkok 10500 within November 14, 2006. Upon Receipt the registrar will deliver cheque of principal and interest via registered mail within November 22, 2006 at their address which are in the registrar book at 12.00 hours of November 14, 2006 Yours faithfully, TMB Bank Public Company Limited. (Mrs.Klairoong Tamanakijprasart ) Authorized Signature Registrar and Paying Agent Investor Services Operations Division Tel. 0-2230-6061,0-2230-5731