Game changer: The iPhone then and now

From the original iPhone to the iPhone 4S, here's how Apple upped the ante on each iPhone model

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The iPhone's evolution: 2007 to 2011

The wraps are now off the new iPhone 4S. But how does it compare to past models? Take a tour of each generation of iPhone and the capabilities it has brought to the mix: the processors, storage capacity, touchscreens, sensors and more.

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iPhone processors

iPhone processors

iPhone: 412MHz Samsung 1176

iPhone 3G: 412MHz Samsung 1176

iPhone 3G S: 600MHz Samsung Cortex-A8

iPhone 4: 800MHz Apple A4

iPhone 4S: 1GHz Apple A5

iPhone cameras

iPhone cameras

iPhone: 2-megapixel, still-only rear camera

iPhone 3G: 2-megapixel, still-only rear camera

iPhone 3G S: 3-megapixel, still-and-video rear camera, with autozoom and autofocus

iPhone 4: 5-megapixel, still-and-video (720p) rear camera, with autozoom, autofocus and LED flash; 0.7-megapixel, still-and-video front camera

iPhone 4S: 8-megapixel, still-and-video (1080p) rear camera, with autozoom, autofocus, LED flash, IR filter and image stabilizer; 0.7-megapixel, still-and-video front camera

iPhone storage capacity

iPhone storage capacity

iPhone: 128MB of RAM; 4GB, 8GB, and 16GB flash storage

iPhone 3G: 128MB of RAM; 8GB and 16GB flash storage

iPhone 3G S: 256MB of RAM; 8GB, 16GB, and 32GB flash storage

iPhone 4: 512MB of RAM; 16GB and 32GB flash storage

iPhone 4S: 1GB of RAM; 16GB, 32GB, and 64GB flash storage

iPhone touchscreens

iPhone touchscreens

iPhone: 3.5 inches diagonally, 320 by 480 pixels

iPhone 3G: 3.5 inches diagonally, 320 by 480 pixels

iPhone 3G S: 3.5 inches diagonally, 320 by 480 pixels

iPhone 4: 3.5 inches diagonally, 640 by 960 pixels (Retina display)

iPhone 4S: 3.5 inches diagonally, 640 by 960 pixels (Retina display)

iPhone sensors

iPhone sensors

iPhone: Accelerometer, proximity, ambient light, microphone

iPhone 3G: Accelerometer, proximity, ambient light, microphone

iPhone 3G S: Compass, accelerometer, proximity, ambient light, microphone

iPhone 4: Gyroscope, noise cancellation, compass, accelerometer, proximity, ambient light, microphone

iPhone 4S: Gyroscope, noise cancellation, compass, accelerometer, proximity, ambient light, microphone

iPhone dimensions and materials

iPhone dimensions and materials

iPhone: 4.8 ounces, 0.48 inches thick, aluminum and plastic shell

iPhone 3G: 4.7 ounces, 0.48 inches thick, plastic shell

iPhone 3G S: 4.8 ounces, 0.48 inches thick, plastic shell

iPhone 4: 4.8 ounces, 0.37 inches thick, aluminum and glass shell

iPhone 4S: 4.8 ounces, 0.37 inches thick, aluminum and glass shell

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