-Translation - AIS-CP 071/2006 May 24, 2006 Re: Notification of the Book Closing for Interest Payment of Debentures of the Company (AIS073A) To: The President The Stock Exchange of Thailand Refer to: The Letter No. ISO.ISIO.06/1598 of TMB Bank PLC on May 24, 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), the details are shown in the referenced letter. Please be informed accordingly. Yours faithfully, (Signed) Anek Pana-apichon (Mr.) Vice President-Finance & Accounting Shin Corporation Group Referenced Letter ISO.ISIO.06/1598 May 24, 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 June 7, 2006 for the right to receive the interest for the period # 17. AIS073A will be paid the interest on June 21, 2006 with interest rate 5.25 % from the period of March 21, 2006 to June 20, 2006 for 92 days. Yours faithfully, TMB Bank Public Company Limited. (Mrs.Klairoong Tamanakijprasart ) Authorized Signature Registrar and Paying Agent ISO.ISIO. Department Tel. 0-2230-5731, 0-2230-5487