The source said on the application for a patent filed by Samsung. In the application described folding smartphone with a flexible screen. The intent of the inventors, flexible site should do pretty extensive, so the device could not add slightly different options, so that one part was peeking out from behind another. So it is possible to obtain the optimal configuration for the three modes. In one mode the priority is given to the area of the screen, in the other — it is possible to remove the camera. The third mode is optimal for the playback of sound as it opens the loudspeaker.
Of course, the user interface automatically adapts to the selected use case of the device.