A mobile communication device configured to operate in at least a first mode and a second mode is provided. The mobile communication device includes a housing, a light emitting unit configured to emit at least a first color when the mobile communication device is operated in the first mode and to emit a second color when the mobile communication device is operated in the second mode, and a filtering unit having at least a first pattern associated with the first mode and a second pattern associated with the second mode. The filtering unit is configured to display the first pattern with the first color in the housing when the mobile communication device is operated in the first mode and to display the second pattern with the second color in the housing when the mobile communication device is operated in the second mode.