The 5s does not have a BootROM exploit (like the iPhone 4's Limera1n). The first BootROM exploit for 64-bit devices didn't arrive until the checkm8 exploit in 2019, which works for the iPhone 5s—but only if you have a Mac or Linux computer, and even then, it requires tethered booting.
while iOS 7 was still being signed. Without these unique digital signatures, you cannot perform a standard, permanent downgrade to iOS 7.
Apple stopped officially "signing" iOS 7 years ago, meaning you cannot simply use iTunes to go back. Downgrade Iphone 5s To Ios 7
To downgrade your iPhone 5s to iOS 7, you'll need:
Your iPhone 5s must currently be jailbroken on its active firmware (e.g., iOS 12 via Chimera or checkra1n) to set the "generator" value. The 5s does not have a BootROM exploit
Tools like (a highly respected, community-driven script) allow you to easily downgrade any iPhone 5s to iOS 10.3.3 completely untethered.
What your computer runs (Mac, Windows, or Linux?) Whether you have saved SHSH blobs from the past Your exact iPhone 5s model number Without these unique digital signatures, you cannot perform
In this article, we'll walk you through the step-by-step process of downgrading your iPhone 5s to iOS 7. Before we begin, it's essential to note that downgrading your iPhone's operating system can have some risks and consequences, which we'll discuss later.
This usually means you are using a USB 3.0 port. Switch to a USB 2.0 hub or an older Mac. Also, ensure your 5s is not passcode locked.