Apple introduced iPhone 4S in October at Let's talk iPhone event. It was criticized too much because it featured the same design as it preceded iPhone 4 had. However, it also has better processor, improved camera and Amazing personal assistant, Siri. There were many controversies behind the popularity of this Phone,because at some places it was added in the list of biggest flops of 2011 while on the other side it became the most selling Smartphone in a quarter.
However, according to recent survey by comScore, iPhone 4S has successfully raised Apple's Smartphone market share to 29%. From August to November, a significant raise of about 1.4% has been seen in the Apple's market share.