I had a bit of a panic moment this morning when I whipped out my Galaxy S3 (to take a photo of may Academy Award as you do), and found stripes & lines like the ones in the picture to the left flickering across my screen in the camera app and appearing in the photos. I feared a trip back to the shop was necessary. Thankfully that was not the case, as in a moment of inspiration, I remembered having played around with the ISO settings, and that is how I fixed the problem. The ISO setting had simply been too high. Setting it back to auto or just to a lower setting got rid of the stripes in the app and in the photos for me. Hope that works for you too!