The Smartisan U2 Pro comes with Smartisan OS 3.6 based on Android 7.1. It features the Qualcomm Snapdragon 626 Octa Core processor, one of the most reliable, high-performance processors available. It can read 13.6 hours in a row, continuously watch 10.5 hours of video, and even continuously play 7.1 hours of games. These high specs are packed into a sleek and elegant phone, a definite winner in the mid-priced segment.