iOS 8 on the iPhone 4S: Performance isn't the (only) problem | Ars Technica
IPhone 4S / iPad 2 etc will be out of the list of update compatible terminals with iOS 10 appeared - GIGAZINE
iPhone 4s Now Officially 'Obsolete' After Apple Announces iOS 10 | wnep.com
iOS 7 on iPhone 4S and iPad 2: life on the edge of Apple's lifecycle
HackYouriPhone (HYi) on X: "Apple has changed the list of devices compatible with iOS 10. No iPhone 4S, iPad mini, iPad 2/3, iPod touch 5G. https://t.co/9ZRagE9OaC" / X
How to get iOS 10 on iPhone 4/4s/5/5c/5s/6 and above - YouTube