Apple iPhone 3G is the second generation of iPhone. The iPhone 3G features a 3.5-inch screen 320-by-480-pixel resolution at 163 ppi with scratch-resistant glass sitting on top of the display. The iPhone 3G's back featured a redesigned plastic polycarbonate housing, replacing the aluminum back of the first generation. After long-time use, some parts of your iPhone 3G could suffer from wear and tear, and you might have to repair them. If so, ETrade Supply could be your ideal choice to get the iPhone 3G replacement parts.