LG G FlexLG announcede that its curved and slightly bendable G-Flex smartphone will hit the US by April in partnership with telecom firms AT&T, Sprint and T-Mobile. The G-Flex uses flexible OLED (organic light-emitting diode) to produce a curved six-inch display. "G-Flex is the world's first curved and flexible smartphone," said LG Electronics USA mobile communications head Frank Lee. The high-definition curved screen is powered by a similarly curved battery and designed to bend slightly, if for example the user accidentally sits on it.