Translation AIS 0166/2001 February 28, 2001 Subject : Notification of register book closing date to determine the right to receive dividend To : President Stock Exchange of Thailand Re : Letter No. AIS 0154/2001, dated February 27, 2001 In reference to the letter No. AIS 0154/2001, dated February 27, 2001, with regard to the dividend payment, for the fiscal year from January 1 to December 31, 2000 for Baht 270 Million common shares at the rate of Baht 4 per share, the Company would like to notify that April 9, 2001 at 12.00 p.m. will be the closing date and time of share registration book to determine the right to receive the dividend and the right to attend the Annual General Meeting of Shareholders for the year 2000. The dividend payment will be issued to the shareholders on May 25, 2001. Please be informed accordingly. Sincerely yours, Signed Mr. Somprasong Boonyachai Director Advanced Info Service Plc.