Hey guys. I've done some searching with no luck, hopefully this won't be a completely new problem that needs troubleshooting. So, sometimes my phone screen freezes up and doesn't respond to touch. This only happens to part of the screen. The notification bar slides up and down. and the last 3/4" of the screen responds (so I can swipe through my menu bars and access apps at the bottom of the screen), but the rest remains inactive. Sometimes it starts responding, other times I have to restart (turn off/on) my phone. Is the processor just overburdened? A certain app acting squiffy and throwing everything off? Thanks in advance for your help!