-Translation - AIS-CP 069/2005 June 28, 2005 Re: The amendment on the terms and conditions regarding payment methods of the Company's debentures To: The President The Stock Exchange of Thailand According to the offering of Advanced Info Service Public Company Limited ("the Company")'s debentures, the details of the Company's debentures are as follows: 1. Debentures of Advanced Info Service Plc. No. 1/2001, due 2006 (AIS063A) 2. Debentures of Advanced Info Service Plc. No. 3/2001, due 2006 (AIS06NA) 3. Debentures of Advanced Info Service Plc. No. 1/2002, due 2009 (AIS093A) 4. Debentures of Advanced Info Service Plc. No. 2/2002, due 2009 (AIS093B) 5. Debentures of Advanced Info Service Plc. No. 3/2002, due 2007 (AIS073A) 6. Debentures of Advanced Info Service Plc. No. 4/2002, due 2007 (AIS07OA) The Company has considered the amendment on the terms and conditions in Section No.11 regarding payment methods of the Company's debentures as stated that the bondholders will receive payment of their interest and/or principal only by cheque. In order to increase the convenience to bondholders, the Company has also added a payment system by auto-transfer to their accounts. This amendment will not affect the bondholders'rights in any way. Please be informed accordingly. Sincerely yours, (Signed) Mr. Pong-Amorn Nimpoonsawat Chief Finance Officer Advanced Info Service Public company Limited