NIU Niutek 4.0D official Pictures. NIU Niutek 4.0D is a Smartphone of niu. The NIU Niutek 4.0D Android Smartphone. Announced Dec 2013. Features 4.0″ Display, MT6572 Chipset, 3.15 MP Primary Camera, 1.3 MP Front Camera, 1500 MAh Battery, 512 MB Storage, 256 MB RAM. NIU Niutek 4.0D price starts.