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.
Background wallpaper
Thanks to iOS 4, the iPhone 4 (along with the iPhone 3G and iPhone 3GS) now has customizable background wallpaper.
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.
Glass back
The iPhone 4 is clad in glass on both front and back.
5-megapixel camera
The iPhone 4 has a 5-megapixel camera and LED flash on the back.
Front-facing camera
The iPhone 4 also has a front-facing VGA camera, which will work with Apple's new FaceTime video-calling feature.
Multitasking
With iOS 4, the iPhone 4 has limited multitasking abilities.
Folders
Also with iOS 4, the iPhone 4 lets you group applications into folders on the home screen.
Camera zoom
The iPhone 4's camera lets you apply digital zoom when taking photos.
Solid feel
At 4.8 ounces, the iPhone 4 feels sturdy yet lightweight.
Virtual keyboard
The iPhone 4 retains the same virtual QWERTY keyboard from previous iPhones.
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