difference between 4 and 4s iphone

iPhone 4 cases will probably not be a great fit on the new 4S

Apple never make it easy for case makers and the new iPhone 4S is no different with its slightly different location for the silent button and volume buttons that will cause bumper style cases and tight fitting tailored cases not to fit correctly. ¬†Until we get a hands on look we cannot see what cases will and won’t fit but if you have ordered a new iPhone 4S I would wait until you get one in your hand before you start buying a new case.