Have used Mazuma before, but never again. My iPhone 11 Pro max was perfect, however they said there were black dots within the camera lens - if there were any they were microscopic as you couldn't see them on a white background (the white background was a piece of electrical trunking on someone's desk so there could be all sorts of things on it). On asking for evidence of this I was sent a video of someone else's phone! It seems they have microscopic dots in their camera lens too. VERY UNHAPPY, has taken a week for them to make decisions - all they seem interested in is trying get into a bartering situation by offering a low price in the hope you will just agree. Not for me.