September 2013: Apple introduces the
iPhone 5S. Its Apple A7 chip makes it the first
64-
bit iDevice. ... September 2014: The
iPhone 6 and
6 Plus are released. Their Apple A8 chip is Apple's second
64-
bit SoC. Apple stops selling the
iPhone 4S, making the
iPhone 5C the last of the 32-
bit iPhones.
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