The new iPhone 4S is here—though you might not know it at first glance. Like the transition from the iPhone 3G to 3GS in 2009, the change from iPhone 4 to 4S is not a cosmetic one. Apple seems to be making a habit of alternating between major cosmetic changes and major internal changes when it comes to iPhone hardware, and this is definitely an "internal change" kind of year. But it's what's inside that counts, right?
The iPhone 4S is now the only device that comes with what Apple describes as a voice-activated virtual personal assistant called Siri. The iPhone 4S also sports a completely redesigned antenna that Apple claims will drastically improve call quality and data speeds over the iPhone 4. And the iPhone 4S comes with the new A5 processor introduced in the iPad 2 earlier this year, giving it a performance boost over its predecessor. Even the built-in camera received some nice spec bumps.
These are the most important new elements to the iPhone 4S, and they're what we'll focus on in this review. If you want to read more about the basic iPhone 4 design, you can read our in-depth review from 2010. And if you want to learn all about the new features that come with iOS 5—which works on a variety of Apple hardware—we have a review for that, too! But right now, it's time to focus on the major new features of the iPhone 4S.