The demo video solely provides us a glimpse of the entrance of the gadget, and the display screen seems to wrap across the telephone, rolling up from the underside edge. At least so far as prototypes go, this idea seems to be on the “operational” aspect of the spectrum — there are no less than battery and mobile indicator icons on display screen. The rolling show is a versatile OLED panel, measuring 6.5 inches when prolonged and retracting all the way down to “just over” 4 inches.