It is a super dooper chartbuster smartphone.It has a mammath 6gb ram with Qualcomm MSM8996 Snapdragon820 chipset Quadcore CPU.It can do multitasking without any limits and lags .Gamers gonna surely love this.It runs on Android OS, v6.0( Marshmallow) .It has a 64gb internal memory which is not expandable but I think 64gb is enough for a smartphone.It has a 21mp, f/2.0, supports Optical Image Stabilization and can take life like pictures in low light, it also has a 8mp front camera.It has an ultra hd 5.7inch ips capacitive touchscreen.It has a non-removable 3100mah battery which is descent.So overall it is a high performance smartphone.I wiil surely recommend it to every gamer out there.Thank You