Connect your device -> Click on the Serial Number until it changes to "ECID." Right-click to copy.
Relaunch the tool and try the installation again. The software should now ping the server, see that your ECID is "Authorized," and proceed. Important Warnings
Are you seeing this error on a specific or a system bypass utility?
When you see this error in a third-party installation tool, it usually means:
The tool you are using requires your device to be in their database before it allows the installation to proceed.