what is the difference between the Iphone 4 and Iphone 4s?
umm siri... Not sure how this is history related..?
Even though I don't agree with your placement of this question, here is a chart by a very reliable online review/download website. http://reviews.cnet.com/8301-19512_7-20114949-233/iphone-4-vs-iphone-4s-comparison-chart/
One slight change in the design would be the placement of the buttons on the left spine. the iPhone 4S’ mute button and the volume keys are raised just a little bit compared to the older model (GSM variant). It is quite a minute difference. However, protective cases that have these precise button openings for the iPhone 4 may not necessarily fit the newer version. For CDMA variants, some users have noted that their version of iPhone 4 cases will also likely fit the 4S. this isnt history related
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