A mobile terminal includes a main body, a display, a controller, memory, and a component module. The controller receives locked state information and module identification information of the component module and determines that the component module is a registered component module. The controller further identifies the component module as accessible when the component module is the registered component module or the locked state information indicates that the component module is in the unlocked state, connects to the component module. The controller further changes the locked state information from the lock state into the unlocked state, and deletes the module identification information of the component module from the memory.
