As of 2025, the golden era of unsigned restores is fading. The last great hardware exploit (checkm8) is nearly 7 years old. Only devices with A11 or older chips can be downgraded freely and reliably.
If you attempt to shift-restore (Windows) or option-restore (Mac) an unsigned IPSW file through standard iTunes, you will immediately encounter or the message: "This device isn't eligible for the requested build."
Understanding Apple’s Signing System: Signed vs. Unsigned IPSW
A cross-platform command-line tool part of the libimobiledevice project. It's essentially an open-source implementation of the iTunes restore process. unsigned ipsw restore tool free
Restoring an unsigned IPSW is technically impossible for the average user because Apple must provide a digital signature (SHSH blob) to authorize the installation. Once Apple "unsigns" a firmware version, their servers will no longer provide this authorization, causing standard tools like iTunes and Finder to block the process.
Whether you want to downgrade your iPhone to boost performance, extend battery life, or install a jailbreak, navigating the world of unsigned firmware can be complex. Here is everything you need to know about unsigned IPSWs, the tools available, and how to attempt a restore without spending a dime. What is an Unsigned IPSW?
You will see websites charging $50–$100 for "unsigned restore tools." Be skeptical. In 99% of cases, they are repackaging or iRemovalPro (which are free) and adding a license check. As of 2025, the golden era of unsigned restores is fading
is a free online tool that lets you grab your SHSH2 blobs. Without these, downgrading to an unsigned version is generally impossible on modern devices. Crucial Requirements Before You Start
This comprehensive guide breaks down how Apple’s signing system works, the truth behind "free unsigned restore tools," and the only legitimate methods available to downgrade or restore your device.
: The most widely recognized free tool for manual restores of unsigned firmware using saved blobs. If you attempt to shift-restore (Windows) or option-restore
While many premium tools exist, these free or community-driven options are widely used in the jailbreak and tech communities: YouTube·Technology Welfare
You can install slightly older signed versions (usually 1-2 months old) using supervised mode and DelayOTA profiles. Not truly unsigned – Apple still signs these temporarily.
While it claims to support unsigned restores, it can still only successfully flash an unsigned IPSW if you upload valid, locally saved SHSH2 blobs for that specific device, or if you are working with an ancient device vulnerable to hardware exploits.
A successful unsigned restore tool exploits one of three things: