In Pictures: Apple’s most important iPhone upgrade...
Now a household phrase, Siri was the new kid on the block when it was originally introduced with the iPhone 4s. The initial feature set of Siri was somewhat limited, but in true Apple style, Siri's capabilities have slowly but surely expanded quite considerably over the past few years. From making dinner reservations to checking the latest sports scores to finding out what's trending on Twitter, Siri can do a whole lot these days.
In Pictures: Apple’s most important iPhone upgrades over the years