-Translation- AIS-CP 041/2010 April 9, 2010 Subject: Notification of the adjustment to exercise price and exercise ratio of ESOP Warrants Grant IV and V To: The President The Stock Exchange of Thailand According to the 2010 Annual General Meeting of Shareholders of Advanced Info Service Public Company Limited (the "Company") which was held on April 8, 2010 had passed a resolution to approve the dividend payment for the second half operating result of 2009 at the rate of Baht 3.30 per share and an additional dividend at the rate of Baht 5.00 per share, approximately totaling Baht 24,621.27 million to the shareholders of the Company. Upon the resolution, the Company has announced to distribute the dividends in excess of 50% of the net profit after income tax of its consolidated financial statement. This has affected on the adjustment to exercise price and exercise ratio of warrants to purchase the Company's ordinary shares, which were offered to directors and employees of the Company (ESOP) Grant IV and V as stated in Clause 2.6 (v) of the Prospectus offering the ESOP Program. The ESOP warrant holders shall not be decreased their rights. Therefore, the adjustment to exercise price and exercise ratio of ESOP warrants are shown as follow; ESOP Grant IV Before adjustment After adjustment Exercise price (Baht per share) 89.292 82.418 Exercise ratio (warrant:common shares) 1:1.19454 1:1.29417 Number of shares to be allotted (shares) 10,574,228 11,631,223* ESOP Grant V Before adjustment After adjustment Exercise price (Baht per share) 79.029 72.945 Exercise ratio (warrant:common shares) 1:1.15737 1:1.25390 Number of shares to be allotted (shares) 6,731,993 7,388,230* Number of additional shares to be allotted after adjustment of exercise price and exercise ratio of ESOP Total 1,713,232 shares * Calculated from the outstanding of unexercised warrants The new exercise price and new exercise ratio shall be effective immediately on April 12, 2010, which is the first day of XD sign posting onwards. As a result, the Company currently has sufficiently reserved shares for the exercise of ESOP warrants. The Company has already allotted the additional shares to reserve for the new exercise ratio of ESOP Grant IV and V in the 2010 Annual General Meeting of Shareholders. Yours faithfully, -Signed- Mr. Pong-amorn Nimpoonsawat Chief Finance Officer Advanced Info Services Plc.