How To Find Your iPhone Or iPad ECID
Unique to each iOS device, the ECID is the identifier used to assign vital data to a device when iTunes requests Apple’s servers to sign a firmware as part of the SHSH protocol. The ECID is required when saving SHSH blobs for a device to secure the option of downgrading to older versions of iOS even after Apple has stopped signing them. Why would you need to downgrade to older firmware, you ask? The most common reason would be to jailbreak.
Apple tends to plug jailbreak exploits as fast as they are made public, which makes updating a risky proposition for anyone looking to make use of a jailbreak solution promised for a soon-to-be-outdated version of iOS. Saving SHSH blobs for the device while said version is still being signed secures the option to roll back to it if and when the jailbreak is released.
If you are here, you are most likely looking to do the same, and that is exactly what we are going to help you with. Following is the easiest way to find the ECID of your iPhone, iPad or iPod touch.
If you already have your ECID and are looking to save SHSH blobs for your device, head on over to our SHSH/SHSH2 guide here: How To Save SHSH2 Blobs For Your iOS Device Using TSS Saver.
Unless your device is already jailbroken, you’re going to need to connect it to a computer that has iTunes installed. The rest is quite straight forward.
1. Connect your iOS device to your Windows PC or Mac via USB.
2. Launch iTunes.
3. From the navigation bar at the top, select the icon shaped like the connected device.
4. With Summary selected from under the “Settings” section in the left sidebar, you should see the device’s Serial Number on the right. Click it twice to display the ECID instead.
5. Right-click the hexadecimal ECID string, select Copy, and save it in a safe place. Do not share this identifier with anyone.
On Your Device
If your device is already jailbroken with Cydia installed, things get a lot simpler.
1. Launch Cydia.
2. Switch to the Search tab, search for and install the free UDID Calculator package.
3. Return to the Home screen, launch UDID Calculator and you should find your device’s ECID displayed in decimal form.
Note that when using the ECID copied from UDID Calculator, you will have to select the Decimal option from under the “ECID” section on the TSS Saver website.