iPhone 6 - 96% battery life - iOS 8.0.2 I called a doctor's office, listened to the menu, and when I went to select "2" the screen was black. Hitting the home button did nothing nor the volume buttons nor shaking it. I don't think I got to the power button before the operator picked up. The voice worked fine but when the call was done the screen was still black. At that point I hit the home button and it came up to the lock screen. Any ideas?