-Translation- AIS 0387/2003 December 15, 2003 Subject : The Change in Amount of Debentures (AIS093A) To The President The Stock Exchange of Thailand Refer to the letter no. FN126/2003 Re: Report of Bond Buy Back and Redemption (AIS093A), dated November 28, 2003. Advanced Info Service Public Company Limited ("the issuer") partly bought back 50,000 units of the debentures of Advanced Info Service Public Company Limited No. 1/2002 Due 2009 (AIS093A). The registrar had cancelled the debenture certificates of such amount on December 12, 2003, so the outstanding amount of AIS093A reduced to 2,450,000 units. Please be informed accordingly. Yours sincerely, -Signed- Mr. Somprasong Boonyachai Director Advanced Info Service Public Company Limited Legal & Compliance Department Tel. 0-2299-5561