Samsung z4 is not my favorite smart phone. This phone is working is very low because the ram of this phone is 1 gb is not working properly. In phone open the app at not is one click Is open after some time. Camera of front is 5 megapixels and the rear camera is 5 megapixels but not result of pictures of this megapixels. Result of picture is bed. The amount of this phone is satisfied the customer but the phone is not satisfied. The other feture of this phone is average. Therefor this phone is my own review is not purches.