-Translation- AIS-CP 101/2008 August 22, 2008 Subject: Notification of the adjustment to exercise price and exercise ratio of ESOP Warrants Grant III, IV, and V To The President The Stock Exchange of Thailand According to the Board of Directors' Meeting of Advanced Info Service Public Company Limited (the "Company") No. 5/2008 held on August 13, 2008 passed a resolution to approve an interim dividend for the first half of 2008 at the rate of Baht 3.00 per share, approximately totaling Baht 8,885 million to the Company's shareholders. Upon the resolution, the Company has announced to distribute the dividends in excess of 50% of the net profit 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 III, IV, and V as stated in Clause 2.6 (v) of the Prospectus offering the ESOP Program of the Company. The ESOP warrant holders shall not be decreased their rights. The adjustment to exercise price and exercise ratio of ESOP Warrants were shown as follow; ESOP Grant III Before adjustment After adjustment Exercise price (Baht per share) 80.574 79.646 Exercise ratio (warrant : common shares) 1:1.13920 1 : 1.15247 Number of shares to be allotted (shares) 5,314,173 5,369,012* ESOP Grant IV Before adjustment After adjustment Exercise price (Baht per share) 94.820 93.728 Exercise ratio (warrant : common shares) 1 : 1.12490 1 : 1.13801 Number of shares to be allotted (shares) 10,391,434 10,482,324* ESOP Grant V Before adjustment After adjustment Exercise price (Baht per share) 83.923 82.956 Exercise ratio (warrant : common shares) 1 : 1.08989 1 : 1.10259 Number of shares to be allotted (shares) 9,931,349 10,025,300* Number of additional shares to be Total 239,679 shares allotted after adjustment of exercise price and exercise ratio of ESOP * The Company will allot the additional shares to reserve for the new exercise ratio of ESOP in the AGM 2009. The new exercise price and new exercise ratio shall be effective immediately on August 22, 2008 or the first day of XD sign posting onwards. The Company will allot the additional shares to reserve for the new exercise ratio of ESOP Grant III, IV, and V in the 2009 Annual General Meeting of Shareholders. Yours faithfully, -Signed- Mr. Pong-amorn Nimpoonsawat Chief Finance Officer Advanced Info Services Plc. Compliance Department Tel. 02-687-4278, 02-615-3277