IPhone 4S announced iPhone 5s and iPhone 5c. This was unusual for Apple as an upper case 'S' had been used since the introduction of the iPhone 3GS in 2009. On September 9, 2014, the iPhone 4S was officially discontinued following the reveal of the iPhone 6 and the iPhone 6 Plus. However, 4S production did continue for developing markets until February 17, 2016. On June 13, 2016, following the release of iOS 10, Apple dropped support on the iPhone 4S, making iOS 9.3.5 the last version available for the device. The runs iOS, Apple's mobile operating system. The user interface of
IPhone 5 on September 10, 2013 with the announcement of its successors, the iPhone 5S and the iPhone 5C. The iPhone 5 has the second-shortest lifespan of any iPhone ever produced with only twelve months in production, breaking with Apple's standard practice of selling an existing iPhone model at a reduced price upon the release of a new model. This was broken by the iPhone X which only had ten-months in production from November 2017 to September 2018. It was replaced as a midrange and then an entry-level device by the iPhone 5C; the 5C internal hardware specifications are almost identical to