The newest iPhones are top-to-bottom better phones with lots of enhancements; iPhone 6 owners don't need the upgrade, but everyone else should seriously consider it.
The iPhone 6 is an exceptional phone in nearly every way except its average battery life: it's thin, fast, and features the excellent iOS operating system. It was the best overall phone introduced in 2014.
The iPhone 6 Plus is an outstanding choice for those with big budgets and big pockets, but power users seeking even more flexibility should audition the Galaxy Note 4 as well.
The iPhone 5S is not a required upgrade, but it's easily the fastest and most advanced Apple smartphone to date.
The iPhone 5C is a great $99 phone that basically replicates the well-reviewed iPhone 5 in a more colorful case.
The iPhone 5 completely rebuilds the iPhone on a framework of new features and design, addressing its major previous shortcomings. It's absolutely the best iPhone to date, and it easily secures its place in the top tier of the smartphone universe.
Along with the iPhone 4S, Sprint adds an 8GB version of the iPhone 4.
Despite some important missing features, a slow data network, and call quality that doesn't always deliver, the Apple iPhone sets a new benchmark for an integrated cell phone and MP3 player.
At a hefty cost, the Virgin Mobile iPhone 4 delivers an unlimited plan without a contract -- just don't expect blazing-fast data speeds.
With the iPhone 4, Apple again shows that it is a powerful player in the smartphone wars. It won't be for everyone, the call quality and reception vary if you don't use a case, and AT&T's network remains a sticking point, but the handset's striking design, loaded feature set, and generally agreeable performance make it the best iPhone yet.