AIS-CP 034/2007 April 3, 2007 Subject: Report on the results of the exercise of warrants (ESOP Grant I, II, III, IV) in March 2007. To: The President The Stock Exchange of Thailand Advanced Info Service Public Company Limited ("the Company") issued and offered the warrants to purchase the Company's ordinary shares to directors and employees of the Company (ESOP). The details of Warrants are as follows: Details of ESOP Grant I Grant II Grant III Grant IV The number of warrants (units) 14,000,000 8,467,200 8,999,500 9,686,700* Issuing Date March 27, 2002 May 30, 2003 May 31, 2004 May 31, 2005 Exercise Price (Baht/Share) 44.620 39.131 83.844 98.667 Exercise Ratio (warrant : common share) 1:1.07512 1:1.10857 1:1.09477 1:1.08103 Maturity of Warrants 5 years from the issuing date * Total number of ESOP warrants Grant 4 to be issued and offered is 9,794,800 units; however they are allotted 9,686,700 units to directors and employees. The Company would like to report the results of the exercise of warrants (ESOP Grant I, II, III, IV) in March 2007 as follows: Outstanding of ESOP Grant I Grant II Grant III Grant IV No. of exercised warrants in this month (units) 23,800 769,300 - - No. of remaining unexercised warrants (units) - 975,400 8,147,000 9,686,700 No. of shares derived from this exercise (shares) 25,587 846,169 - - No. of remaining shares reserved for warrants (shares) - 981,203** 8,520,790 10,116,900 ** The 2004 Annual General Meeting of Shareholders has approved the additional allotments of common shares reserved for ESOP warrants of Grant 1 and 2 amounting to 125,591 shares, so this amounts is reserved for ESOP Grant 1 amounting to 4,076 shares. Please be informed accordingly. Yours faithfully, -Signed- Somprasong Boonyachai (Mr.) Director Advanced Info Service Public Company Limited