AIS-CP 058/2007 June 4, 2007 Subject: Report on the results of the exercise of warrants (ESOP Grant II, III, IV and V) in May 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 II Grant III Grant IV Grant V The number of warrants (units) 8,467,200 8,999,500 9,686,700* 10,138,500 Issuing Date May 30, 2003 May 31, 2004 May 31, 2005 May 31, 2006 Exercise Price (Baht/Share) 39.131 83.844 98.667 87.328 Exercise Ratio (warrant : common share) 1:1.10857 1:1.09477 1:1.08103 1:1.04738 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 II, III, IV and V) in May 2007 as follows: Outstanding of ESOP Grant II Grant III Grant IV Grant V No. of exercised warrants in this month (units) 124,400 27,700 - - No. of remaining unexercised warrants (units) 764,500 8,119,300 9,686,700 10,138,500 No. of shares derived from this exercise (shares) 137,904 30,324 - - No. of remaining shares reserved for warrants (shares) 902,409 9,090,466 10,466,900 10,278,500 Please be informed accordingly. Yours faithfully, -Signed- Somprasong Boonyachai (Mr.) Director Advanced Info Service Public Company Limited