Provided herein are an electronic device and a method for controlling the electronic device, the electronic device including a display including a main display area arranged on a front surface of the electronic device and a sub display area that extends from one side of the main display area and arranged on at least one area of a rear surface of the electronic device; a receiver including audio output circuitry configured to output audio received from an external terminal; a display antenna located on one or more of the main display area and the sub display area, and configured to perform communication with an external terminal; and a processor configured to control the display antenna based on a network state or a type of an application being executed.