To fix the "Unable to request SHSH" error in 3uTools (often occurring around 9% during the flashing process), you generally need to
Remember: If Apple has stopped signing the iOS version you want, no tool on Earth can request a valid SHSH. In that case, your only options are to update to the latest signed version or use a jailbreak-based blob saver (like TSS Saver) that requires previously saved blobs. how to fix error unable to request shsh on 3utools when top
Sometimes "Normal Mode" or "Recovery Mode" fails to trigger the SHSH request correctly. To fix the "Unable to request SHSH" error
What is SHSH?