The most common reason for this error is trying to install an iOS version that Apple has locked down. Apple quickly stops signing older firmware after a new iOS release to keep users secure.
If none of the above steps resolve the issue, you may need to reinstall 3uTools:
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. i unable to request shsh 3utools fix install
: This is the most common fix. Older versions of the software may have outdated server links. Visit the 3uTools official site to download and install the latest version. Check Signing Status
A device stuck in a normal boot state can sometimes fail to request blobs properly. The most common reason for this error is
Apple strictly blocks the installation of expired iOS versions. If you are trying to downgrade to an unsigned firmware version, the standard SHSH request will fail every time.
Restart your computer, restart the iPhone, and try a different USB port—preferably a direct USB 2.0 port if using a PC. Avoid USB hubs. 5. Re-download the Firmware File The IPSW file you downloaded might be corrupt. This link or copies made by others cannot be deleted
(not a paper but reliable)
: This is the most common resolution. Older versions may have bugs or lack support for newer iOS signatures. Download the latest version directly from the official 3uTools site Verify Apple Signing Status