-Translation- AIS-CP 051/2008 April 16, 2008 Subject: Notification of the adjustment to exercise price and exercise ratio of ESOP Warrants Grant II, III, IV, and V To: The President The Stock Exchange of Thailand According to Annual General Meeting of Shareholders for 2008 of Advanced Info Service Public Company Limited (the "Company") held on April 10, 2008 passed a resolution to approve the dividend payment for the second half of 2007 to shareholders at the rate of Baht 3.30 per share,approximately totaling Baht 9,771.55 million to the shareholder 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 the 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 II, 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 II Before adjustment After adjustment Exercise price (Baht per share) 38.322 37.605 Exercise ratio (warrant:common shares) 1 : 1.13197 1 : 1.15356 Number of shares to be allotted (shares) 389,688 389,688* ESOP Grant III Before adjustment After adjustment Exercise price (Baht per share) 82.111 80.574 Exercise ratio (warrant:common shares) 1 : 1.11788 1 : 1.13920 Number of shares to be allotted (shares) 5,661,373 5,734,391* ESOP Grant IV Before adjustment After adjustment Exercise price (Baht per share) 96.628 94.820 Exercise ratio (warrant:common shares) 1 : 1.10385 1 : 1.12490 Number of shares to be allotted (shares) 9,967,081 10,387,214* ESOP Grant V Before adjustment After adjustment Exercise price (Baht per share) 85.523 83.923 Exercise ratio (warrant:common shares) 1 : 1.06949 1 : 1.08989 Number of shares to be allotted (shares) 9,370,808 10,119,302* Number of additional shares to be allotted after adjustment of exercise price and exercise ratio Total 1,241,645 shares of ESOP * Calculated from the outstanding of unexercised warrants The new exercise price and new exercise ratio shall be effective immediately on April 16, 2008,which is the first day of XD sign posting onwards. As a result, provided that, 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 II, III, IV, and V in the 2008 Annual General Meeting of Shareholders. Yours faithfully, -Signed- Mr. Vikrom Sriprataks Director Advanced Info Services Plc. Compliance Department Tel. 02-687-4278, 02-299-5226