It's not a question that I need it, but for me it is nice to have. I find it very easy to use. Put your subject in the intersecting lines then touch the screen to focus and take the pic. Simple. The pictures are not too bad also. You don't need this function and I probably don't either but it is still nice to have for those of us who like it. I also like how you can touch anywhere on the screen and it will focus on that spot with the phone. This is not a Galaxy S3 forum I realize that, but all I am saying is it would be nice to have this feature of the grid lines, for me anyway, on my Nikon D3200. Sorry to drag this on. I guess that I will have to get some good shots without the grid lines. lol thanks for your replies.