iPhone 4 is the fourth generation iPhone. Its 3.5-inch LED backlit liquid crystal display with a 960×640 pixel resolution is marketed as the "Retina display". The iPhone 4 runs Apple's iOS operating system. It is mainly controlled by a user's fingertips on the multi-touch display. The iPhone 4 is structured around a stainless steel frame that wraps around the edge of the phone. Your iPhone 4 may become attrition after long-time use. ETrade Supply provides the iPhone 4 (Verizon Wireless/CDMA) replacement parts, which can give your device a fresh look.