-Translation - AIS-CP 057/2005 May 20, 2005 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. IVS. 05/0971 of Thai Military Bank on May 20, 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 (AIS073A), the details are shown in the referenced letter. Please be informed accordingly. Sincerely Yours, (Signed) Mr. Anek Pana-Apichon Vice President - Finance & Accounting Shin Corporation Plc. Group Group Compliance Tel. 02-299-5561 Referenced Letter IVS 05/0970 May 20, 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 June 7, 2005 for the right to receive the interest. AIS073A will be paid the interest on June 21, 2005 with interest rate 5.25 % from the period of March 21, 2004 to June 20, 2005 for 92 days. Yours faithfully, -Sign- (Klairoong Tamanakijprasart) Manager IVS & IB Ops. Department Registrar & Paying Agent IVS & IB Ops. Department Tel. 0-2230-5575, 0-2230-5487