Ref: FN102/04 9 August 2004 Subject Notification of new Trustee and Registrar Attention President Stock Exchange of Thailand We would like to notify you that DBS Thai Danu Bank Public Company Limited (DTDB) the Trustee and Registrar of Advanced Info Service Public Company Limited's debentures, AIS04NA, AIS063A, AIS06NA, AIS073A, AIS093A and AIS093B will merge with Thai Military Bank Public Company Limited (TMB) after which DTDB will become part of TMB. The company would like to inform you that DBS Thai Danu Bank Public Company Limited has already performed all the necessary steps and procedures in accordance with all the terms and conditions in relation to the changes in Trustee and Registrar as stipulated in the Terms and Conditions Governing the Debenture and Registrar Appointment Agreement from DTDB to TMB. Such changes will become effective from September 1, 2004 onwards. Please be informed accordingly. Regards, -Signed- (Mr.Pong-Amorn Nimpoonsawat) Chief Finance Officer