Evolution of the iPhone

Published On: Oct 03 2011 01:49:57 PM CDT   Updated On: Jan 09 2014 09:26:04 AM CST

Today is the seventh anniversary of the very first iPhone. Take a look back at how far this game-changing smartphone has come.

iPhone 5S unveiled
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CNN

The 5S comes in metallic hues and features performance upgrades, including the first 64-bit chip in a smartphone. Apple's A7 has tested at up to twice as fast as the iPhone 5's processor. There's also a fingerprint scanner for security and a motion co-processor that will let the phone be used as a fitness tracker along the lines of a FitBit.

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