Face Time front camera
8 MP back camera
CPU Apple A5 (dual core 32-bit ARM Cortex-A9 at 800 MHz)
Screen 3.5-inch Retina display
(960 x 640, 326 ppi, 3:2 ratio)
Ports 30-pin dock connector
3.5 mm headphone jack
Colors Black, white
Dimensions 4.5 x 2.31 x 0.37 in. (115.2 x 58.6 x 9.3 mm)
Weight 4.8 oz (137 g)
The new features of the iPhone 4S are mainly internal changes regarding speed and new features including Siri, a voice-controlled digital assistant. Though in addition to the upgrades mainly regarding performance, various software features were also introduced exclusive to the iPhone 4S.
The iPhone 4S retains most of the exterior design of its predecessor, the iPhone 4. The front and back are flat, the screen made out of glass. There is a camera on the front and the back, the sides are made out of stainless steel with metal buttons. It keeps it’s 3.5 inch (8.89cm) screen of past iPhones with the home button at the bottom, the only changes are the five-lens 8 Mega-pixel camera and the alteration to the Facetime microphone. The iPhone 4S still comes with two colors, black and white.
Processor, memory and storage
The iPhone 4S has a 1GHz Dual-core Apple A5 processor underclocked to 800MHz to extend battery life and to prevent heat, compared to the single-core A4 processor used in the iPhone 4. It has 512MB of RAM, the same as its predecessor.
The camera on the iPhone 4S is capable of shooting 8MP stills (3264×2448) and record up to full 1080p HD at 30 frames per second with upgraded quality (30% better clarity, 26% better white balance and color accuracy). The camera can now be accessed directly from the lock screen, and the volume up button as a shutter trigger. The built-in gyroscope is able to stabilize the camera while recording video. Other features of the camera are macro (for close up pictures) and faster capture including being able to take its first picture in 1.1 seconds and the next half a second later.
The iPhone 4S uses the Apple A5 system-on-a-chip that uses an Imagination Technologies PowerVR SGX graphics processing unit, which features pixel, vertex, and geometry shader hardware, supporting OpenGL ES 2.0 and DirectX 10.1 Shader Model 4.1. The SGX is the same GPU used in the iPhone 4S’ predecessor, the iPhone 4. However, the iPhone 4S uses a dual-core model, the SGX543, that is integrated with the Apple A5 SoC in the same way as the iPad 2.
Apple’s claim that the iPhone 4S can process graphics up to “seven times faster” than the iPhone 4 was corroborated by Epic Games President Mike Capps. At the “Let’s Talk iPhone” event held by Apple on October 4, 2011, Capps demonstrated Epic Games’ Infinity Blade 2, the sequel to Infinity Blade, on an iPhone 4S. Capps boasted that the game uses Epic Games’ Unreal Engine 3 and features the same graphic techniques used in the Xbox 360 game Gears of War 3.
Gaming on the iPhone 4S has been likened to the PlayStation Vita, that features the same SGX GPU only in a quad-core configuration, and the Nintendo 3DS handheld game consoles. Additionally, the iPhone 4S’ ability to process 30 million polygons per second has been compared to the PlayStation 3 and the Xbox 360 home video game consoles that are capable of processing 700 million and 500 million polygons per second respectively.