Firewalls, antivirus software, or bad host files are blocking the connection to Apple's TSS (Ticker Server System) or 3uTools verification servers. Step-by-Step Solutions to Fix the Error
With the phone in DFU mode, a certified cable plugged in, and the antivirus turned off, Alex decided to try requesting the SHSH blob for the currently signed iOS version instead of the old one. how to fix error unable to request shsh on 3utools when new
Below are the most effective solutions, ordered from simplest to most advanced. Firewalls, antivirus software, or bad host files are
The "Unable to request SHSH" error in 3uTools—which often happens at the during flashing— The "Unable to request SHSH" error in 3uTools—which
The most frequent cause for this error on "new" setups is an outdated version of 3uTools that doesn't recognize a newer device or iOS version. Open 3uTools and click Check Update at the bottom right. Ensure you are running the latest version available on the official 3uTools website