Portable terminal assembly

The mobile terminal is a terminal case assembly; And a detachable mobile terminal to the terminal case. Front cover of the terminal case portion having an opening. Display of the mobile terminal unit is covered by the front cover portion. The first application of the mobile terminal has a second user interface as provided by the full area of ​​the display portion on the provided available the first user interface through the opening if part of the front cover is closed, when the addition of the front cover is open. The control unit of the mobile terminal of the first application or if addition the front cover is closed, display a first user interface of the first application, and adding the front cover is opened through the opening through the display section the total area and displaying the second user interface.