Wiko Rainbow UP 4G official Pictures. Wiko Rainbow UP 4G is a Smartphone of wiko. The Wiko Rainbow UP 4G Android Smartphone. Announced May 2015. Features 5.0″ Display, MT6735P Chipset, 8 MP Primary Camera, 5 MP Front Camera, 2800 MAh Battery, 8 GB Storage, 1000 MB RAM. Wiko Rainbow UP 4G price starts.