-Translation- AIS-CP 043/2008 April 1, 2008 Subject: Clarification of the Arbitral ruling between DTAC and DPC To: President The Stock Exchange of Thailand Advanced Info Service Public Company Limited ("the Company") would like to clarify the Arbitral ruling, reference made to the Arbitral Case Black No. 55/2549, between Digital Phone Co., Ltd., which 98.55% is held by the Company, and Total Access Communication Public Company Limited (DTAC), claiming DPC for the assignment of the rights to operate the PCN 1800, the facilities and equipment, the roaming fee according to the Agreement to Unwind the Service Provider Agreement, which details are as follows; On 25 March 2008, the Arbitral has a ruling of Arbitral Case Black No. 55/2549 that DPC should pay DTAC for the amount of US$ 69,901,211.20 plus interest rate at the rate of 9.5% per annum from the claimed amount of US$ 87,376,514.00. The Company and DPC are now considering whether to file the case at Civil Court to revoke the ruling. The aforesaid amount is part of the total amount claimed by DTAC, Baht 4,739 million (excluding the default interest) in which it has been booked in full amount as the concession right payable in DPC financial statements and the Company consolidated financial statement as of 31 December 2007. Please be informed accordingly. Yours sincerely, -Signed- Mr. Vikrom Sriprataks Director Advanced Info Service Plc.