I have using asus zenfone 6 best phone no problem at all with good performance.
Phone features Display 6.0 inches big and Hd diaplay and corning gorilla glass 3, 13mp with led flash back camera very good camera quality and secondary camera 2mp front camera quality good, 2gh ram and internal memory 16/32 gb, battery 3300 mah battery life very good.
I am playing game this phone gaming performance very good