HTC One E9s runs on the android v5 operating system and the processor used here is octa-core MediaTek MT6752 with a remarkable speed of 1.5GHz, with these specifications the performance of the whole system is on a brilliant level.The photography experience is also served by this fantastic smartphone with its primary camera of 13MP that clicks true to life photos, and there is also a front camera of 4MP for the selfie enthusiast.