Find great deals on eBay for iphone 4s ios 5 and iphone 4s ios 5.1.1. Shop with confidence. iOS 10 won’t be coming to the iPhone 4s which means iOS 9.3.5 will be the last update for Apple’s aging former flagship. With that in mind, we want to. iPhone 4S on EVERY Firmware Speed Test! Planned Obsolescence Real? iOS 5 vs iOS 6 vs iOS 7 vs iOS 8 vs iOS 9 Comparison on 4S iOS 5.1 Software Update. Camera shortcut now always visible on Lock Screen for iPhone 4S, iPhone 4, iPhone 3GS and iPod touch (4th generation) Apple recently released an iPhone 4s iOS 9.3.5 update and today we want to take a look at the most important things iPhone 4s users need to know about the. Apple Launches iPhone 4S, iOS 5 & iCloud iPhone 4S Features Dual-Core A5 Chip, All New Camera, Full 1080p HD Video Recording & Introduces Siri Apple said that iOS 9 will bring performance improvements to all iOS devices, including older models that were slowed down by the iOS 8 update. The iPhone 4S (retroactively stylized with a lowercase 's' as iPhone 4s as of September 2013) is a smartphone that was designed and marketed by Apple Inc. When I try to update my iphone 4s from iOS 9.2.1 to 9.3.5 I get an error message Unable to install update. No other clues as to what is going wrong.