K4 IS the best choice after the redmi note 3 in the price range with most of the facilities with great use in daily life in marshmallow 6 updated version. The cornia gorilla glass 3 is good prottective for use but become an exception for me. Its non detachable battery is a minor flaw which creats heat which slows the efficiency a bit. Other wise its great for the time we are in flowing, with VR , finger print and all those that mke ur life smooth and incrediblly sexy.