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[https://en.wikipedia.org/wiki/History_of_iPhone]On June 29, 2007, Apple released version 7.3 of iTunes to coincide with the release of iPhone.
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[https://en.wikipedia.org/wiki/IPhone_3GS]The iPhone 3GS was designed and marketed by Apple Inc It was introduced on June 8, 2009
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[https://en.wikipedia.org/wiki/IPhone_3G]On June 7, 2010, the iPhone 3G was finally discontinued, and replaced as Apple's budget phone by an 8 GB iPhone 3GS selling for the same price of $99 with a 2-year contract.
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[https://en.wikipedia.org/wiki/IPhone_4]The iPhone 4 is a smartphone that was designed and marketed by Apple Inc the iPhone 4 was first released on June 24, 2010
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[https://en.wikipedia.org The iPhone 5 is a smartphone that was designed and marketed by Apple Inc. It is the sixth generation of the iPhone. Formally unveiled as part of a press event on September 12, 2012, it was released on September 21, 2012.]
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[https://en.wikipedia.org The iPhone 6 was announced on September 9, 2014, and released on September 19, 2014]
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[https://en.wikipedia.orgiPhone 6 Plus are smartphone designed and marketed by Apple Inc. The devices are part of the iPhone series and were announced on September 9, 2014, and released on September 19, 2014.
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[https://en.wikipedia.org/wiki/IPhone_7 iPhone 7S were announced on September 7, 2016
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[https://en.wikipedia.org/wiki/IPhone_7 iPhone 7 Plus are smartphones designed, developed, and marketed by Apple Inc. They were announced on September 7, 2016]
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[https://www.google.com Slightly later October 2017 date the curved, all-screen iPhone 8.]
