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
History of iPhone begin producing a CDMA-compatible iPhone, with such a model going on sale in early 2011. On January 8, 2011, the Wall Street Journal confirmed that Verizon Wireless would, on January 11, 2011, officially announce the launch of a CDMA-based iPhone for use on their network. The date in which the Verizon iPhone would go on sale was unknown, though the two most recent iPhone releases were made available within weeks of their launch announcement. Verizon confirmed the announcement on January 11, with an on-sale date of February 10. On January 11, 2011, Verizon announced that they would start carrying a