iPhone 4 introduces a whole new way of multitasking. Now you can run your favorite third-party apps — and switch between them instantly — without slowing down the performance of the foreground app or draining the battery unnecessarily. This smarter approach to multitasking is available only on iPhone.
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iPhone 4 features a high-resolution Retina display, a 5-megapixel iSight camera, FaceTime video calling, and long battery life. And with iOS 6 and iCloud, it does more than ever.