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 5C integration with Twitter, Wikipedia, Bing, and Photos. The highest operating system it supports currently is iOS 10 in 2016. iOS 11 will not support this iPhone, as the phone ceased production in September 2015 and it is also a 32-bit iPhone. Facebook comes integrated through Apple's native apps. Facebook features can be directly accessed from within native apps such as Calendar which can sync Facebook events, or use Facebook's like button from within the Apple App Store. iTunes Radio, an internet radio service, is also included on the iPhone 5C. It is a free, ad-supported service available to all iTunes