Download and open from the Mac App Store. Plug your iPhone into your Mac. Click on your device icon within the application window.
Unzip the file. Open the .plist or .shsh2 file in a text editor. Search for your ECID. If it matches, your ECID is successfully registered.
Create a friendly name to identify your phone (e.g., "John's iPhone 15 Pro").
If you have just unboxed a brand-new iPhone and are diving into the world of custom firmware, beta testing, or jailbreaking, you have likely stumbled upon a critical three-letter acronym: . Specifically, you may have seen the urgent instruction to "register ECID iPhone new" before Apple stops signing a particular iOS version. register ecid iphone new
When Apple releases a new iOS update, they "sign" it, allowing you to upgrade. Once a new version is out, Apple stops signing older versions. If you want to downgrade or stay on a lower firmware (for potential jailbreaking), you must save the APTicket (SHSH blob) specifically for your unique ECID.
This is the most reliable method used by developers and jailbreakers.
While you can always re-enter your ECID to find your saved files, keeping your unique TSS Saver URL bookmarked gives you instant access to your downloaded blobs when you need to perform a restore. If you want to know more about this process, tell me: What model of iPhone are you using? What operating system (Windows or Mac) is on your computer? Are you trying to jailbreak or just downgrade your iOS? Download and open from the Mac App Store
This must be done while the iOS version is still being "signed" by Apple. 2. Apple Developer Account
In the context of a new iPhone, "registering" typically means:
Before you can register your ECID, you need to extract it from your device. You can do this using a computer via macOS or Windows. Method 1: Using Finder (macOS) or iTunes (Windows) Unzip the file
⚠️ ECID is not visible in Settings. You need a computer.
For users who want more control or need to save blobs for unsigned firmwares (using saved blobs from another device), use Legacy iOS Kit.
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