Method for sharing sim card in a mobile communication terminal

The invention the two with each other is set to the other mobile communication terminal is a shared mode, the first mobile communication terminal to the second mobile communication terminal used (Subscriber Identity Module) card requests SIM in through the sub communication while connected to the sub communication If, by the second mobile communication terminals terminate the session with the SIM card built in accordance with the user's permission input, such that the first mobile communication terminal sets the SIM card and the session with the second mobile communication terminal via the sub communication and, and wherein the first mobile communication terminal to share the SIM card between the second mobile communication, different mobile without physically moving the SIM card by using a SIM card built in the terminal to perform a mobile communication system, a communication terminal, You may share the SIM card between different mobile communication terminal without a SIM card sharing device. SIM (Subscriber Identity Module) card, SIM card sharing mode, the sub-communication