Hi my name pankazz I want to tell u reason to not to buy samsung galaxy I have been a very nasty experience of this phone. In this review only foucs the negtive point of this phone reason why should not buy sumsung phone or galaxy j7 yes camera in low light takes grainy pics completely distorted when zoomed in which is quit disappointing. I had problem before I deactived battery saving option in smart manager becouse marshmallow has a battery saving system. and it doesnt have compas sensor please elaborate me how can I use compass in my samsung J7.