For devices with the , Apple introduced nonce entanglement . This means you cannot simply request SHSH without setting a specific generator (Boot Nonce). Solution: Use 3uTools’ "Set Boot Nonce" feature under Toolbox > Advanced before requesting SHSH.
Instead of using , select the iTunes Flash option at the bottom. 4. Inspect Your Network how to fix error unable to request shsh on 3utools when top
Now that we've identified the potential causes, let's move on to the solutions: For devices with the , Apple introduced nonce entanglement
Apple changes its server protocols frequently. An outdated version of 3uTools may try to request SHSH in a way Apple no longer accepts. For devices with the
and downloaded the latest version. In many cases, a simple software update resolves the 9% hang immediately. 2. The Signature Check