-Translation- AIS-CP 007/2008 21 January 2008 Subject: Notification of Memorandum of Understanding singed between Advanced Info Service Public Company Limited and TOT Corporation Public Company Limited To: The President The Stock Exchange of Thailand Advanced Info Service Public Company Limited ("the Company") would like to notify that today the Company and TOT Corporation Public Company Limited ("TOT") signed the Memorandum of Understanding (MOU) in which both companies initially agreed in principle to co-operate and support businesses of each other. Each company would maximize its current expertise and remain on its strong area. TOT would focus on wire network while the Company would focus on wireless network. The co-operation features the idea of "Fixed Mobile Convergence (FMC)" to utilize existing networks more efficiently and to co-develop new products and services in response to the dynamic changes of technology and consumer lifestyles. The integration of wireline and wireless technologies is to provide greater benefits to consumers. From this co-operation, the Company and TOT aim to minimize the investment redundancy and co-utilize resources and facilities more efficiently. This agreement shall not have any impact to cancel, revoke or override the existing contracts or agreements stipulated before the date of this MOU signed. Currently, the Company and TOT are exploring possible opportunities of any future projects together. Shall there be any details or progress on such co-operation, the Company will disclose the detail to the SET immediately Please be informed accordingly. Yours faithfully, -Signed- Mr. Pong-Amorn Nimpoonsawat Chief Finance Officer Advanced Info Service Plc.