: This is the most common fix. Outdated versions may have bugs or lack support for newer device models (like the iPhone 15 Pro) and newer iOS firmware. Verify Apple's Signing Status
The "Unable to Request SHSH" error typically occurs when 3utools is unable to communicate with Apple's servers or retrieve the required SHSH blob. This error can be caused by various factors, including: how to fix error unable to request shsh on 3utools when new
Look at the firmware list in 3uTools. If the version is not marked as "Signed" (usually in green), you cannot flash it without previously saved SHSH blobs. 3. Use the "iTunes Flash" Mode : This is the most common fix