IPhose 4S finally hit the market on 14th Oct 2011. Although market was waiting for IPhone 5 but Apple was smart enough to keep something for future, a standard practice at Apple to under-deliver as that is what their loyal and (recently) royal customers are used too.IPhone 4S has the similar body as IPhone 4 with the major changes of A5 chip with 1+ GHz speed, 8-megapixels camera, and of course iOS 5.0 which is available on IPHone 4 s well as 3GS.Another key feature of IPhone4S is SIRI voice recognition integrated app in iOS 5. Siri on iPhone 4S lets you use your voice to send messages, schedule meetings, place phone calls, and more. Ask Siri to do things just by talking the way you talk. Siri understands what you say, knows what you mean, and even talks back. Siri is so easy to use and does so much, you’ll keep finding more and more ways to use it.