Downgrading Go to product viewer dialog for this item. to iOS 7: A Complete Guide
For the iPhone 5s, iOS 7 has not been signed by Apple since late 2014. Under normal circumstances, this means that downgrading is absolutely impossible. If you plug an iPhone 5s into a computer today and try to install an iOS 7 IPSW file, iTunes will simply refuse to do it. Downgrade Iphone 5s To Ios 7
Now that you're prepared, let's dive into the step-by-step guide: Downgrading Go to product viewer dialog for this item