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The first iPhone was created. 3.5" inch screen, back camera (2MP), 4 or 8 GB storage
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Same screen size and camera, but increase the storage size
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Updated Camera Lens, another storage update
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the time of "selfies", people needed a front camera added. Now has two cameras with updated lens. same storage as iPhone 3GS
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larger screen size, 4". Improvement to cameras. Added a third choice of storage, Siri is added to help simplify work for humans
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Two different designs, do the same thing but one is larger. Increased GB size (options: 16,64,128)
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Kind of going backwards, same design as iPhone 5, but with updated camera.
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Increased camera, water resistant because made of aluminum, took away the aux area for better speakers
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Almost everything the same as 7, but with improved processor
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New design, No more Touch ID. Larger screen but same size phone
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More cameras in the back for better pictures, more durable than other models, longer battery and better speed, and cheaper than previous. models