Cheap third-party cables often fail during data-heavy tasks like SHSH requests.
Apple only allows SHSH requests for currently signed iOS versions.
If an update is available, install it and restart the program before trying the request again. Use DFU Mode for the Request how to fix error unable to request shsh on 3utools when new
3uTools relies on certain drivers bundled with iTunes. Uninstalling and reinstalling the latest version of iTunes can often repair broken driver links.
Check sites like IPSW.me to see if the firmware is still green (signed). Cheap third-party cables often fail during data-heavy tasks
3uTools requires a stable connection to both its own servers and Apple’s TSS (Teleservices Software Server).
Sometimes, 3uTools struggles to grab the ECID or necessary device identifiers while the phone is in regular "Normal" mode. Connect your device to your computer. Use DFU Mode for the Request 3uTools relies
Manually put your iPhone or iPad into (the steps vary by model).
Use the "Query SHSH" feature and manually paste your ECID if prompted, ensuring the model identifier matches your device exactly. Common Workarounds If the error persists despite the steps above: