Mi 4 is a very usefull product and xiomai mi 4 battery life is such a very awsome this product is a very nice and awsome and the camera is a very nive and xiomai all product is such a nice and mi 4 ram is a incridible and rom is a such a gudmi 4 price is such a gud the fingerprint senseor is a very gud but one thing is a bad this is china made phone