-Translation- AIS-CP 074/2004 July 1, 2004 Subject: The Investment by Advanced Info Service Public Company Limited in Data Line Thai Company Limited To: The President The Stock Exchange of Thailand Advanced Info Service Public Company Limited (ADVANC) would like to inform the SET about the investment in Data Line Thai Company Limited (DLT). The details are as follows: Parties Involved Buyer : Advanced Info Service Public Company Limited (ADVANC) Seller: AT Cyber Company Limited (ATC), which holds 65% of DLT's shares Relationship with Listed Company Shin Corporation Public Company Limited (SHIN) is the major shareholder of both ADVANC and ATC. The details are as follows: * SHIN holds 42.94% of ADVANC * SHIN holds 90.91% of AD Venture Company Limited, which holds 47.50% of Arc Cyber Company Limited. Arc Cyber holds 100% of ATC General Characteristics of the Transaction The Company purchased 975,000 shares, i.e. 65%, of the shares of DLT. The Value of investment is Baht 2,413,469. (Consideration from the book value of DLT as of June 30, 2004, approximately 4.9 MB.) Objective of investment To increase the value of the business by diversifying the network communication system Source of capital Working capital of the company Details of the Investment Company name: Data Line Thai Company Limited Nature of business: Internet service Paid-up capital: 1,500,000 shares at par value Baht 10 Proportion of securities holding before: -none- Proportion of securities holding after : 65% Value of Investment Baht 2,413,469 Regulations of Disclosure This transaction is considered to be a connected transaction of listed companies prescribed in the Notification of the Stock Exchange of Thailand (SET), re: Rules, Procedures and Disclosure of Connected Transactions of Listed Companies. The size of transaction is less than 0.03% of net tangible assets of the company as of March 31, 2004. . Please be informed accordingly. Yours sincerely, -Signed- Mr. Somprasong Boonyachai Director Advanced Info Service Public Company Limited Group Compliance Tel. 0-2299-5552