With a revamped design, a sparkling new display, a speedy processor, and additional features, the iPhone 4 is the biggest upgrade to Apple's smartphone since the iPhone 3G. It's also the showcase handset for Apple's newest operating system, iOS 4, which adds a selection of long-overdue features, plus some smaller tweaks that we weren't expecting. If they existed independently, iPhone 4 and iOS 4 wouldn't be much more than blips on the smartphone radar screen.
When combined into one handset, however, the result is a sleek, satisfying, and compelling device that keeps Apple strongly competitive in an increasingly crowded marketplace. Indeed, the iPhone 4 is fast, the new hardware is a looker, and some of the new features blew us away. On other points, however, we have some concerns. Call reception still is problematic, and you'll need to use a case or bumper to avoid any issues with touching the new antenna. On the features side, we welcome multitasking with open arms, but it has its drawbacks. Also, though the FaceTime video calling feature is more than noteworthy, we wonder if our interest will last longer than a week.