NIU Niutek 3G 4.0 N309 official Pictures. NIU Niutek 3G 4.0 N309 is a Smartphone of niu. The NIU Niutek 3G 4.0 N309 Android Smartphone. Announced Jun 2012. Features 4.0″ Display, MT6575 Chipset, 5 MP Primary Camera, 1650 MAh Battery, 512 MB Storage, 512 MB RAM. NIU Niutek 3G 4.0 N309 price starts.