When I bought lenovo vibe K4 I didnt had much expectations but its a promising and well built phone its fingerprint function is flawless and just awesome it is upgradable to 6.0 marshmallow its fantastic and very comfortable
Its built in launcher isnt that great , I use nova launcher , it has moderate battery power , the camera is ?????? it is one of the best merits of this device , lenovo also has an built in phone companion app for any Doubts.