ZTE Grand S Flex official Pictures. ZTE Grand S Flex is a Smartphone of zte. The ZTE Grand S Flex Android Smartphone. Announced Nov 2013. Features 5.0″ Display, Snapdragon 400 Chipset, 8 MP Primary Camera, 1 MP Front Camera, 2300 MAh Battery, 16 GB Storage, 1000 MB RAM. ZTE Grand S Flex price starts.