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 4S The uses a dual-core model that is integrated with the Apple A5 SoC in the same way as the iPad 2. Apple claims that the has up to seven times faster graphics than the iPhone 4; this was corroborated by Epic Games president Mike Capps. The has 512 MB of DDR2 RAM. Maximum available storage size increased to 64 GB while the 32 GB and 16 GB model options were retained. The screen is the same as the prior generation iPhones; , 640×960 resolution (Apple's "retina" design). There was an improvement in interactive multimedia applications compared to its predecessor. The