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 against Apple for infringing eight of its patents. The case was scheduled to begin in 2014. In a statement, Samsung said it had "little choice but to take the steps necessary to protect our innovations and intellectual property rights". Litigation between the two involving patent infringement has been ongoing and is being fought in several court cases around the world. The components and labor required to construct the most basic iPhone 5 are estimated to cost US$207, which is US$19 more than the cost of components for the corresponding iPhone 4s model. The LTE module in the iPhone 5 alone