can be output for visualization data in the frame buffer 330 is transmitted to the display module 380 through the first signal output port 360 in addition the data in the frame buffer 330 is delivered to a signal converting module 114 and the format of the data is converted the format conversion is performed such that the data output from the frame buffer 330 can be displayed on the external device in detail if the display resolution through the display module 380 is 320 u00d7 240 pixels and a display resolution through the tv 600 is 720 u00d7 480 pixels a data format conversion is required to convert the output data to the correct display resolution thus data is converted in such a manner so that the data output through the second output port 370 can be used by the external device e g tv 600 after receiving a code provision request from the multimedia processor 320 a code generator 340 a generates codes and provides the generated code to the multimedia processor 320 the code must be an identification code capable of identifying a mobile communication terminal since every smart card has a serial number i e subscriber number a mobile communication terminal e g a gsm based portable phone using the smart card used for subscriber authentication uses.