Currently, iOS 10.3.3 is the only version you can typically downgrade to untethered without blobs using tools like Legacy iOS Kit
This is the easiest and most official method, but it requires that Apple is currently "signing" the iOS 7 firmware for the iPhone 5s. In the past, Apple has briefly and accidentally opened signing windows for older iOS versions (e.g., for an hour in 2018). If such a window ever reopens, this is the method to use. Downgrade Iphone 5s To Ios 7
This is the safest method because it doesn't risk "bricking" your primary OS, and you get the authentic iOS 7 experience at full speed. Preparation Checklist Currently, iOS 10
Here is a list of third-party tools that can help with the iPhone 5s downgrade to iOS 7. This is the safest method because it doesn't