-Translation- AIS-CP 052/2010 May 24, 2010 Subject: Clarification of impact from political unrest To: The President The Stock Exchange of Thailand Pertaining to the political tension and civil unrest that occurs in several parts of Thailand particularly in Bangkok during the past week, Advanced Info Service Public Company Limited ("the Company") would like to inform you that there was merely a small damage to a certain part of fibre optic transmission in Bangkok. This caused network congestion for a few hours on May 19, 2010, and is now solved and continues normal operation. All network provision and service operations remain as normal. The Company's headquarter and regional offices were as well closed during May 19-21, 2010. Please be assured that the Company maintains the utmost caution for employees' safety and company's property. Shall the company have any updated situation; we will promptly announce through to the Stock Exchange of Thailand. Please be informed accordingly. Yours sincerely, -Signed- Mr. Pong-amorn Nimpoonsawat Chief Finance Officer Advanced Info Service Plc.