Yesterday, I got a phone call while I was standing in direct sunlight and I had the big surprise to see appear on the top of my iPhone 2G's front something that is invisible when the phone is in the shadows. In the middle of the glass, one millimeter below the metallic edge and 4 millimeters above the phone's receiver, there is a small circular hole in the dark background of the glass. 2 millimeters to the right of that circular hole, there is much wider hole, 5 to 6 millimeters. Again, they are almost invisible in normal light conditions. They really look like a hole for a second front camera and a hole for a flashlight...

iphone holes

On the 3G, read this.