Let’s assume you have successfully downgraded your iPhone 5s to iOS 7.1.2 (the final version of iOS 7). You boot up the device, and the nostalgia hits instantly.
However, because Apple uses a "signing" system to authorize software installs, this is a complex technical challenge rather than a simple click of a button. ⚡ The Reality: Is It Possible? Downgrade Iphone 5s To Ios 7
Back up your data: A downgrade requires a full wipe. Modern iOS 12 backups will not work on iOS 7. Let’s assume you have successfully downgraded your iPhone
: iOS 7 lacks over a decade of critical security patches. It is highly vulnerable to modern exploits and should not be used for banking or personal data. and the nostalgia hits instantly. However