If an update is available, install it and restart the program before trying the request again. Use DFU Mode for the Request
Older versions of 3uTools may use outdated server addresses or protocols that Apple has since changed. Open 3uTools on your PC.
Check sites like IPSW.me to see if the firmware is still green (signed). how to fix error unable to request shsh on 3utools when new
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 a port directly on the motherboard (back of the PC) rather than a front-panel port or a hub. If an update is available, install it and
Manually put your iPhone or iPad into (the steps vary by model).
3uTools requires a stable connection to both its own servers and Apple’s TSS (Teleservices Software Server). Check sites like IPSW
If the version is "Unsigned" (red), you cannot request new SHSH blobs for it. Check Your Network Connection
