HTC Desire 10 Pro has 6.0( marshmallow) operating system, which is the latest OS. Moreover it has 3GB RAM for fast processing and 64GB BUILT-IN memory and SD card supports upto 256GB. Battery timing of this phone is almost 19 hours talktime. Its battery is non-removable. It supports 3G as well as 4G. It has high resolution camera of 13 mega pixel. This phone is user friendly. It comes in four colours; stone black, polar white, royal blue and valentine lux. It has reasonable price as it has lot of features