You must select a version that is currently being signed (indicated by a green icon or "Available"). 2. Update 3uTools to the Latest Version
An outdated version of 3uTools may have trouble communicating with newer Apple servers or handling the latest device hardware.
The steps vary by model (e.g., iPhone 8 and later use a Volume Up, Volume Down, Power button combo).
Temporarily disable your Windows Firewall or third-party antivirus to ensure they aren't blocking the connection.
Click to see if 3uTools can find any saved blobs on their cloud server for your specific ECID. ⚠️ Important Note on Downgrading
This is the most common cause. You cannot flash a firmware version that is not signed unless you have previously saved your SHSH blobs. Open 3uTools and go to the section. Look at the list of available firmwares for your device.
Session expired
Please log in again. The login page will open in a new tab. After logging in you can close it and return to this page.