The LG G Flex is the first LG smartphone with a curved display. According to LG, the curve fits the human face shape. For the implementation of the curved OLED display and the curved battery technology, LG used its sister companies, LG Display and LG Chem. Operation of the 6-inch smartphone is similar to the LG G2, via the Rear Key on the back of the device. The reverse of the smartphone is also coated with a self-healing material that is intended to compensate for small scratches and dents, according to the manufacturer.