Install iOS 16 on iPhone 5s It isn't feasible to install iOS 16 on the iPhone 5s. The iPhone 5s works only with iOS versions prior to and including iOS 12. The iPhone 5s will not be able to take advantage of iOS 16 features and updates. It is possible to update their device by buying a more recent iPhone model that is compatible with iOS 16. This video is a must-watch if you want to know how to install iOS 16 onto your iPhone 5s.Copied!!