A: Yes, try using a public DNS server like Google Public DNS or OpenDNS to see if it resolves the issue.
SHSH blobs are digital signatures Apple issues to authorize a specific iOS version installation on a specific device. When you restore or flash firmware, 3uTools tries to request these blobs from Apple’s servers.
Look closely at the list of available firmwares for your device.
Every time you flash or upgrade an iOS device, 3uTools communicates with Apple’s servers to request an SHSH blob. This blob acts as a digital thumbprint, proving to your device that Apple approves the installation of that specific firmware version.
If 3uTools continues to fail despite running the latest update, use Apple's official software to rule out a third-party tool glitch. how to fix error unable to request shsh on 3utools when new
When Apple releases brand-new iPhone hardware (e.g., iPhone 15 or 16 series), legacy versions of 3uTools do not know how to request the appropriate APTicket/SHSH signature syntax for that specific internal chip identifier (EID/ECID).
He had just opened 3uTools, the trusted Swiss Army Knife for iOS enthusiasts. His plan was simple, perhaps a bit paranoid, but standard procedure for a techie like him: backup the blobs. He wanted to save the SHSH blobs for the current iOS version immediately, just in case he needed to downgrade or jailbreak in the future.
Yes, the "Unable to Request SHSH" error in 3uTools is the equivalent of iTunes' "Unknown Error 3503." It signifies a failure in the signature request process.
“What do you mean?” Leo asked, his fingers trembling slightly over the keyboard. A: Yes, try using a public DNS server
If you are an iOS user who likes to tinker with their device—whether for downgrading, jailbreaking, or saving blobs—you are likely familiar with . It is one of the most versatile all-in-one tools for iOS device management. However, if you have recently tried to save your SHSH2 blobs, you may have encountered the frustrating error message: "Unable to request SHSH."
An outdated version of 3uTools often fails to recognize newer hardware architectures or modified Apple server behaviors.
Virtual Private Networks can interfere with the specialized handshake required for SHSH requests.
Ensure there is a next to the specific iOS version you want to install. Look closely at the list of available firmwares
Add a # at the beginning of those lines to disable them, or delete those lines entirely. Save the file and restart your computer. 4. Update 3uTools and iTunes Drivers
| Step | Action | |------|--------| | ✅ | iOS version still signed? | | ✅ | Update 3uTools to latest | | ✅ | Run as admin | | ✅ | Switch SHSH server (Auto/Apple/3uTools) | | ✅ | Disable firewall temporarily | | ✅ | Try TSS Saver website as fallback |
If you have tried all the steps above and are still getting "Unable to request SHSH," it might simply be a waiting game. The developers of 3uTools usually push a hotfix within 24 to 48 hours of a major iOS release.