The present application relates to a method for controlling operation of a display area in a foldable device, an electronic device and a
mobile phone thereof, the foldable device including first and second display areas, and a third display area, the first and second display areas being configured to display the first and second display areas when an angle between the first and second display areas is expanded to 180 degrees, and the third display area being configured to display the first and second display areas when the angle is expanded to 180 degrees. The first display area and the second display area are on a first plane of the
flexible display, and the first display area and the second display area are divided based on a foldable area in the
flexible display, and the third display area is on a second plane extending at a predetermined angle from the first plane, the third display area extends from the outside toward the second display area, the method including: detecting a first value when an angle between the first display area and the second display area spreads into a first angle range; displaying a graphical interface of the first function in a third display area based on the first value; executing the selected second function based on a
user input selecting the second function in the graphical interface; detecting a change of an angle between the first display area and the second display area to a second value within a second angle range; and performing a third function through at least a partial region of the first display region or the second display region based on the second value.