What? Foreheads? Chins? Kate explains:
You’ve seen them. It’s likely your smartphone, iPhone or Android, has one or both. The forehead is the bar of technological gadgetry at the top; that area just below the top bezel. It hold cameras and sensors and microphones and other miniature marvels. The chin works about the same way.
That’s where the Home button is. Or, was. iPhone X shows the future. Small bezels all around, Notch, no forehead or chin.