-Translation- AIS-CP 081/2010 August 16, 2010 Subject: Notification of the adjustment to exercise price and exercise ratio of ESOP Warrants Grant V To: The President The Stock Exchange of Thailand According to the Board of Director Meeting of Advanced Info Service Public Company Limited (the "Company") No. 5/2010, which was held on August 6, 2010 had passed a resolution to approve an interim dividend payment for the first half operating result of 2010 at the rate of Baht 3.00 per share, approximately totaling Baht 8,902 million to shareholders. 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 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 V Before adjustment After adjustment Exercise price (Baht per share) 72.945 71.891 Exercise ratio (warrant:common shares) 1:1.25390 1:1.27228 Number of shares to be allotted (shares) 6,762,134 6,512,420 Number of additional shares to be allotted -* after adjustment of exercise price and exercise ratio of ESOP * The Company has allotted sufficient shares to reserve for the new exercise ratio of ESOP since its AGM 2010. The new exercise price and new exercise ratio shall be effective immediately on August 17, 2010, which is the first day of XD sign posting onwards. Yours faithfully, -Signed- Mr. Pong-amorn Nimpoonsawat Chief Finance Officer Advanced Info Services Plc. Cc: The Securities and Exchange Commission