Click submit. The service will now fetch the current digital signatures from Apple. provided; this is your personal cloud folder where all future blobs will be stored. Pro-Tip: Automated Registration

Before you can register it, you need to find the hex or decimal string. Method 1: Using iTunes or Finder (PC/Mac) Connect your device to your computer via USB. Open (Windows) or Finder (macOS). Click on your device icon.

Here is why registering your ECID and saving SHSH blobs is vital:

Registering Your ECID: The Complete Guide to iPhone Saving & Restoration

Whether you are a casual user wanting a safety buffer against bad updates or a seasoned jailbreaker, locating and registering your ECID is a best practice that secures your digital autonomy. Don't wait until it's too late—register your ECID while the firmware you are currently on is still being signed.