This smartphone is one of the best smartphone in this world. This is the only smartphone with 4k display. Viewing angles of the screen are very good. Images are soo sharp. And thus device is poweredd bye snapdragon 810 chipset. 3gb of ram. And very good camera. It has a fingerprint sencor also which works blazingly fast. Battery back up is quit average. And performance wise its above average and the build quality is quit premium. The rear panel is mirror finished. N looks preety desent.