iPhone 4S Review: It's a Sure Thing

The iPhone 4S follows Apple’s recent trajectory of iPhone releases: It’s an object of some appeal to people who last upgraded their phones a year ago, and over the next year a great many of them will find it worthwhile to upgrade to the iPhone 4S. But to all those people who’ve been hanging on to their iPhone 3G or iPhone 3GS, the wait is over: It’s time to upgrade without any hesitation whatsoever.