I have the same problem with screen zooming and clicking on apps without me touching it. I also can't scroll, if I lock it by clicking power button and then unlock it usually works about 10 seconds then starts glitching again. I have erased everything on phone and had a new screen with LCD installed and the problem is still there. I can't pay $300 for a new one. How do I fix it??? It has ios 8.0.3(newest ios). thx