After revealing it at the prototype at the SDC last November, Samsung has officially introduced its foldable smartphone dubbed as Galaxy Fold at its Unpacked event. It has a 7.3-inch QXGA+ Dynamic AMOLED 4.2:3 aspect ratio Infinity Flex Display, which folds into a compact device with a 4.6-inch HD+ Super AMOLED 21:9 aspect ratio cover display. Samsung says that it has Samsung’s largest-ever smartphone display and added that it has been in development over eight years following the debut of Samsung’s first flexible display prototype in 2011.