-Translation- AIS-CP 054/2010 June 1, 2010 Subject: Report on the results of the exercise of warrants (ESOP Grant IV and V) in May 2010. 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 of ESOP Grant IV * Grant V The number of warrants (units) 9,686,700 10,138,500 Issuing Date May 31,2005 May 31,2006 Exercise Price (Baht/Share) 82.418 72.945 Exercise Ratio (warrant:common share) 1:1.29417 1:1.25390 Maturity of Warrants 5 years from the issuing date The Company would like to report the results of the exercise of warrants (ESOP Grant IV and V) in May 2010 as follows: Outstanding of ESOP Grant IV * Grant V No. of exercised warrants in this month (units) - - No. of remaining unexercised warrants (units) 8,987,400 5,849,700 No. of shares derived from this exercise (shares) - - No. of remaining shares reserved for warrants (shares) 11,574,228 7,678,703 * Maturity date of ESOP Grant 4 is on May 30, 2010. (5 years from the issuing date) Please be informed accordingly. Yours faithfully, -Signed- Mr. Vikrom Sriprataks Director Advanced Info Service Plc.