While everyone dreamed, LG went to work and built its first-ever curved phone, the G Flex; The G Flex is a high-end smartphone in every way, but its 6-inch screen doesnt lay flat — it bends. At first, I almost didnt notice the gentle concavity of the G Flex. The G Flex exists almost entirely to show off LGs curved OLED display, the 6-inch, 720p screen that is the centerpiece of its design.