HUAWEI has introduced its first foldable smartphone – Mate X at an event in Barcelona, as it had promised. It has a 6.6-inch OLED screen on the front and 6.38-inch screen on the back that expands to a 8-inch screen when unfolded. It features a Falcon Wing design with a stretchable hinge for a smooth and flat finish on both sides of the device. The screen doesn’t over stretch while folding or bulge in unfolding. It is just 5.4mm at its thinnest point.