New hardware

The Apple iPhone 4 is a dramatic redesign over its predecessors. It now sports a thinner, more squared-off look, plus the Retina Display is simply gorgeous.
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Background wallpaper

Thanks to iOS 4, the iPhone 4 (along with the iPhone 3G and iPhone 3GS) now has customizable background wallpaper.
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Silver sides

In a departure from previous iPhones, the iPhone 4 has straight silver edging. On its side are also two volume buttons and a silent switch.
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Glass back

The iPhone 4 is clad in glass on both front and back.
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5-megapixel camera

The iPhone 4 has a 5-megapixel camera and LED flash on the back.
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Front-facing camera

The iPhone 4 also has a front-facing VGA camera, which will work with Apple's new FaceTime video-calling feature.
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Multitasking

With iOS 4, the iPhone 4 has limited multitasking abilities.
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Folders

Also with iOS 4, the iPhone 4 lets you group applications into folders on the home screen.
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Camera zoom

The iPhone 4's camera lets you apply digital zoom when taking photos.
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Solid feel

At 4.8 ounces, the iPhone 4 feels sturdy yet lightweight.
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Virtual keyboard

The iPhone 4 retains the same virtual QWERTY keyboard from previous iPhones.
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