A whole host of features have been added, such as Siri, an intelligent assistant that helps users get things done just by asking.
Siri understands context allowing users to speak naturally when they ask it questions or give it commands.
As for the camera, the 4S includes a camera with the most advanced optics of any phone.
The 8 megapixel sensor has 60 percent more pixels so you can take amazing high quality photos with more detail than ever.
iPhone 4S includes a new custom lens, a larger f/2.4 aperture and an advanced hybrid IR filter that produce sharper, brighter and more accurate images.
Here is a full list of the specifications:
* Capacity: 16GB, 32GB, 64GB
* RAM: 1024MB
* Processor: Dual-Core A5
* Operating System: iOS 5
Height: 115.2 mm
Width: 58.6 mm
Depth: 9.3 mm
Weight: 140 grams
UMTS/HSDPA/HSUPA (850, 900, 1900, 2100 MHz);
GSM/EDGE (850, 900, 1800, 1900 MHz)
Wi-Fi (802.11n 2.4GHz only),
Bluetooth 4.0 wireless technology
* Location: Assisted GPS, Digital compass, Wi-Fi, Cellular
3.5-inch (diagonal) widescreen Multi-Touch display
960-by-640-pixel resolution at 326 ppi
800:1 contrast ratio (typical)
500 cd/m2 max brightness (typical)
Fingerprint-resistant oleophobic coating on front and back
Support for display of multiple languages and characters simultaneously
Rear-facing 8-megapixel camera, Autofocus, Face detection in still images, LED flash
Video recording, HD (1080p) up to 30 frames per second with audio
Front camera with VGA-quality photos and video at up to 30 frames per second
Built-in rechargeable lithium-ion battery
Charging via USB to computer system or power adapter
Talk time: Up to 8 hours on 3G, up to 14 hours on 2G (GSM)
Standby time: Up to 200 hours
Internet use: Up to 6 hours on 3G, up to 9 hours on Wi-Fi
Video playback: Up to 10 hours
Audio playback: Up to 40 hours
Ambient light sensor