Firmware Umbrella needs ECID of your iPhone, iPad or iPod Touch to save SHSH blobs of your iDevice locally either from Apple or Saurik server. We have already shared a comprehensive step-by-step guide to save your ECID on Windows and Mac. However there is another easy way to grab ECID of your iDevice without putting it into Recovery Mode. EmailECID is an app which allows you to grab ECID of your iDevice easily by mailing it to your email address.
In order to downgrade your iPhone OS to previous firmware releases by Apple, you must save your SHSH blobs either by using Firmware Umbrella or by using AutoSHSH Grabber. Incase you are using Firmware Umbrella to backup your SHSH blobs, you must enter your ECID during the backup procedure. However AutoSHSH Grabber allows you to save your SHSH blobs automatically without prompting you for the ECID of your iDevice.
EmailECID App can be downloaded through Cydia from ModMyi repository for free.
You may also like to read:
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- How to Recover Deleted Photos After Jailbreaking with Spirit on Windows and Mac
- Download AppSync for iPad OS 3.2
- Guide To Jailbreak iPhone OS 3.1.3 & OS 3.1.2 With Spirit