The "Unable to request SHSH" error in 3uTools typically occurs during the flashing or restoration process, often stalling at around 9%. This error is the 3uTools equivalent of iTunes Error 3503, indicating a failure to communicate with Apple's servers to verify the firmware's digital signature. 1. Update 3uTools to the Latest Version

  • Third-party AV (Norton, McAfee, Avast, etc.): Disable real-time protection.
  • Add 3uTools as an exception to prevent future blocks.

    • This error also appears when:

    Option B: Use Legacy iOS Kit (For advanced users)

    • If you absolutely need to flash an unsigned firmware and you have blobs, ditch 3uTools. Use Legacy iOS Kit (open-source Python tool). It is far more reliable for SHSH management.