PHOTO GALLERY: iPhone 4 vs. iPhone 3GS

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Front-Facing Camera: One of the biggest iPhone 4 touts is its front-facing camera for video calling. iPhone 4 users will be able to chat with each other using an app called FaceTime anywhere a Wi-Fi connection is available.

Front-Facing Camera: One of the biggest iPhone 4 touts is its front-facing camera for video…