Manually put your device into (Device Firmware Update).
: Apple only "signs" certain firmware versions (usually the most recent). If you are trying to downgrade to an older, unsigned version, 3uTools will fail because Apple's servers are no longer authorizing those installs. You can check current signing status at IPSW.me . how to fix error unable to request shsh on 3utools when top
Often, a damaged cable or a slow USB 3.0 port causes packet loss during the SHSH request. Manually put your device into (Device Firmware Update)
You cannot flash a firmware version that Apple has permanently closed to the public unless you possess local SHSH backups. Visit an online verification archive like IPSW.me. Select your specific iPhone, iPad, or iPod model. You can check current signing status at IPSW
Sometimes your device is in a "stuck" recovery state that confuses 3uTools. Exiting and re-entering recovery mode resets the USB communication.
To fix the error on 3uTools (often occurring at the 9% mark), you must either update your software or switch to a signed iOS version . This error occurs when the tool cannot retrieve digital signatures from Apple's servers to authorize the installation. 🛠️ How to Fix the Error 1. Update 3uTools
Only versions highlighted in Green are actively being signed by Apple. Versions in Red are closed. If your target file is red, you cannot flash it using standard methods unless you have previously saved custom local SHSH blobs. Select a green-lit, signed version instead. 2. Update 3uTools to the Latest Version