-Translation- AIS-CP 085/2007 August 24, 2007 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 Board of Directors' Meeting of Advanced Info Service Public Company Limited (the "Company") No. 5/2007 held on August 14, 2007 passed a resolution to approve the dividend payment for the first half of 2007 to shareholders at the rate of 3.00 Baht per share,approximately totaling 8,871.47 million Baht 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 separate 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) 39.131 38.322 Exercise ratio (warrant:common shares) 1 : 1.10857 1 : 1.13197 Number of shares to be allotted (shares) 685,577 685,577* ESOP Grant III Before adjustment After adjustment Exercise price (Baht per share) 83.844 82.111 Exercise ratio (warrant:common shares) 1 : 1.09477 1 : 1.11788 Number of shares to be allotted (shares) 8,133,982 8,133,982* ESOP Grant IV Before adjustment After adjustment Exercise price (Baht per share) 98.667 96.628 Exercise ratio (warrant:common shares) 1 : 1.08103 1 : 1.10385 Number of shares to be allotted (shares) 10,466,900 10,692,664** ESOP Grant V Before adjustment After adjustment Exercise price (Baht per share) 87.328 85.523 Exercise ratio (warrant:common shares) 1 : 1.04738 1 : 1.06949 Number of shares to be allotted (shares) 10,024,013 10,583,138** Number of additional shares to be allotted Total 784,889 shares after adjustment of exercise price and exercise ratio of ESOP * The Company has sufficiently reserved shares for the new exercise ratio of ESOP warrants. ** The Company will allot the additional shares to reserve for the new exercise ratio of ESOP in the next shareholders meeting. The new exercise price and new exercise ratio shall be effective immediately on August 24, 2007 or 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, therefore, will allot the additional shares to reserve for the new exercise ratio of ESOP Grant II, III, IV, and V in the 2007 Annual General Meeting of Shareholders. Yours faithfully, -Signed- Vikrom Sriprataks (Mr.) Director Advanced Info Services Plc.