The iPhone 5 has an all new design, faster processor, and bigger screen. A four inch screen has replaced the 3.5 inch display on the 4S and it now sports a 16x9 ratio, which is optimal for watching movies and playing games. Apple also gave the iPhone 5 a sleeker look, making it 18% thinner and 20% lighter. A two-toned back has replaced the glossy glass of the 4S, the white version of the 5 showing off raw aluminum while the black model features black anodized aluminum.