Coming from a mini s3, except for the disappearance of the menu button, which is confusing, the universe remains the same but more fluid, fast, amazing 4G! The fingerprint recognition system requires a technical and efficient recording, done in record do not want (as is explained yet) too well present his fingers, do as you would by being pressed, as in everyday life, not the place straight, because when you save "too much" and then not play the same gesture "perfect" when unlocking. A small weakness as smartphones across the battery in heavy use requires daily recharging.