iPhone 4S is the fifth generation of the iPhone, succeeding the iPhone 4. The iPhone 4S retains the exterior design of its predecessor, such as the 3.5-inch Retina display with a 960×640 pixel resolution, but iPhone 4S added a voice recognition system known as Siri and a cloud storage service named iCloud. After daily use, your iPhone 4S may suffer from wear and tear. ThePartsHome offers various replacement parts for iPhone 4S with competitive prices.