This ia a really superb smartphone with Android OS, V5.1 Lollipop(amigo 3.1). Quad Core 1.3 GHz processor makes it really fast. I love this because of its 1GB RAM and 16 GB ROM. Its Proximity sensor, G-sensor, E-Compass, Motion sensor, Light sensor are working fine. I just love its camera system(5.0 Mega Pixel Camera with LED flash) and the secondary camera is 2 MP. HD Video Recording made it very attractive. There are some other features are available like Geo-Tagging, Panorama, HDR, Face Beauty, Pic Note, Filter. Battery is not so bad which is 2000mAh Li-Ion. Some excellent features like WLAN Direct, Auto call record, Mobile Security, compass, Smart gesture(Pause alarm, Smart bright screen, black screen gesture, Double click to wake) Tethering & Hotspot, Theme park, Mood Card, Gstore, chameleon, Green background Mode, Ami Locker made it just awesome, I love Gionee Pioneer P5W.