An unstable internet connection or a firewall may be blocking communication with Apple's verification servers.
Sometimes poor power delivery through a USB hub causes communication errors during the SHSH negotiation phase. Plug your iPhone directly into the motherboard USB port. 3utools Error Unable To Request Shsh
Open it with Notepad and delete any lines containing apple.com or ://apple.com . Save the file. 4. Update 3uTools to the Latest Version An unstable internet connection or a firewall may
: A local firewall, antivirus software, or custom hosts file is blocking 3uTools from communicating with Apple’s verification servers. 95% of cases.
The “Unable to Request SHSH” error in 3uTools is or local network blocking. If the iOS version is still signed, following the steps above (especially firewall disable + cache clear) resolves it in >95% of cases.