-Translation- AIS-CP 051/2005 May 4, 2005 Subject: Report on the results of the exercise of warrants (ESOP Grant I and II) in April 2005. To: The President The Stock Exchange of Thailand Advanced Info Service Public Company Limited ("the Company") issued and offered the warrants to purchase the Company's ordinary shares to directors and employees of the Company (ESOP). The details of Warrants are as follows: Details ESOP Grant I ESOP Grant II The number of warrants 14,000,000 Units 8,467,200 Units Issue Date March 27, 2002 May 30, 2003 Exercise Price Baht 46.780 per share Baht 42.302 per share Exercise Ratio 1 warrant per 1.02549 ordinary shares Maturity of Warrants 5 years from the first date of the issuance and offering of warrants The Company would like to report the results of the exercise of warrants (ESOP Grant I and II) in April 2005, as follows: Details ESOP Grant I ESOP Grant II The number of exercised warrants in this month 96,900 units 20,000 units The number of remaining unexercised warrants 4,344,800 units 5,897,100 units The number of ordinary shares derived from this exercise 99,367 shares 20,509 shares The number of remaining ordinary shares reserved for warrants 4,555,757 shares 6,155,581 shares Please be informed accordingly. Yours sincerely, -Signed- Mr. Somprasong Boonyachai Director Advanced Info Service Public Company Limited