A 5.5-inch Retina HD display with 3D Touch. 7000 series aluminum and stronger cover glass. An A9 chip with 64-bit desktop-class architecture. - Sight camera with Live Photos. Touch ID. Faster LTE and Wi-Fi. Long battery life and i - OS 9 and i - All in a smooth, continuous unibody design. 5.5-inch (diagonal) Retina HD display with 1920-by-1080 resolution 3D Touch A9 chip with M9 motion coprocessor 12MP i - Sight camera with Focus Pixels, True Tone flash and Live Photos 4K video recording at 30 fps and slo-mo video recording for 1080p at 120 fps 5MP Face - OS 9 and i