The error is simply a "Stop" sign telling you that the software doesn't recognize your device yet. By finding your unique ID and registering it on the developer's official portal, you can bypass this hurdle and get back to your installation.
If iTunes/Finder receives a "No" to either question, you get the "ECID not registered" error. ecid not registered install
Apple uses this ID to verify that the firmware you’re installing is specifically intended for your device. Third-party tool developers use it to track which devices have access to their software—essentially using it as a "product key". Why You’re Seeing "ECID Not Registered" This error usually occurs for one of three reasons: Server Authorization: Most bypass or jailbreak tools (like Broque Ramdisk The error is simply a "Stop" sign telling