The people at the famous website known as iFixit got their hands early on the long-waited iPhone 4S, and guess what, they teared it apart!
The video below is their official review of the event and explains everything very well, so I really recommend you to watch it. Some of the differences found between the iPhone 4 and the new device include a new battery which supposedly adds 1 more hour of fun, but 100 less hours of stand-by, a new A5 Apple processor, an upgraded 8-megapixels camera, and more!