A method of controlling a mobile terminal, and which includes controlling, via a Windows processor, a plurality of peripheral devices of the mobile terminal; switching, via the Windows processor, the mobile terminal into a sleep state; granting, via an arbiter control processor, a control authority for controlling predetermined peripheral devices among the plurality of peripheral device to a 3G modem when the mobile terminal is switched into the sleep state; receiving, via a communication unit on the mobile terminal, an incoming call; and managing, via the 3G modem, circuit data and the predetermined peripheral devices for the incoming call.