AIS 0241/1999 October 21,1999 Re : Clarify the acquisition of ADVANC To : President Stock Exchange of Thailand Refer to the letter No. 0239/1999 on October 20,1999 Refer to the notification of Advanced Info Service Plc. (ADVANC) regarding of the acquisition of investment in Shinawatra Datacom Ltd. (SDC) and Data Network Solution Ltd. (DNS) The company would like to clarify that the firm value of both companies has been calculated by Discounted Cash Flow method based on the assumptions agreed by both parties. Yours Faithfully, -Signed- (Mr.Somprasong Boonyachai) Director Advanced Info Service Plc.