had something happen that never happened prior. This morning while browsing online my iPhone froze somewhat. The time updated and I could see the second hand moving on the clock app. But the screen wasn't responsive to my touch. I couldn't swipe to unlock. My fingers were clean. I've never dropped the phone and the screen was clean. The only major change was iOS 9 installed on Wednesday which worked fine all week and over the weekend I downloaded crystal which gabe no problems previous. I tried hitting the home button and tried turning the sleep button but none responded. I finally force quit it hitting home and sleep and wake together. It rebooted and it was fine. Haven't had issues all day. Any idea what was up. This was the first issue like this I've ever had.