Error -44 (SEP firmware mismatch) or baseband error -1.
What your computer runs (Mac, Windows, or Linux)? What iOS version your iPhone 5s is currently using?
: You can use dual-boot or tethered downgrade tools. The catch? You will need a computer to boot your phone every time it restarts. Prerequisites and Requirements
Once you successfully downgrade, you will notice a massive leap in user interface fluidity. Animations are instant, and the overall system feels remarkably lightweight compared to iOS 12. However, using iOS 7 in the modern day comes with significant practical limitations: Downgrade Iphone 5s To Ios 7
I can provide the exact terminal commands and download links tailored to your setup! Share public link
If you are already on a version of iOS that can be jailbroken (like iOS 12.5.7), you don't actually need to "downgrade" your main system. You can dual-boot. Jailbreak your iPhone 5s using Chimera or Checkra1n. Open Cydia or Sileo and add the CoolBooter repo. Install CoolBooter and select iOS 7.0.x or 7.1.x.
There is, however, a singular caveat for the tech-savvy. The iPhone 5s sits on the cusp of Apple's security architecture. It utilizes the A7 chip, which is susceptible to a hardware bootrom exploit known as "checkm8" (discovered by axi0mX). Error -44 (SEP firmware mismatch) or baseband error -1
The exact found on the back of your iPhone 5s (e.g., A1533, A1457)
: Because the Secure Enclave Processor (SEP) cannot be downgraded without blobs, features like locks will not function. Broken Services
Release the button but keep holding the Home button for another 10 seconds. : You can use dual-boot or tethered downgrade tools
Community tools like automate the creation of custom, exploit-patched firmware. Open the Terminal app on your Mac.
John spent the next few hours exploring iOS 7, rediscovering old features and apps. He was surprised by how much he had missed the Control Center, which was introduced in iOS 7.