That's what the developer says about Cookie Cydia app:
Cookie can Backup your iPhone Activation Tickets to Cloud, and once you back it up, you can Restore it to your iPhone ANY TIME! Ticket data is stored on weiphone servers. Use this if you have Activation Tickets gotten by SAM trick, do it before it’s too late.Very nice feature, isn't it? The backup process goes smoothly and without any issues and the app shows the date of your last backup right away. Be sure to check your iPhone's UDID and IMSI numbers before backing up the activation (you can check UDID in iTunes and IMSI in SAM's More Information tab). this link to save SAM activation ticket without Cookie.
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LetsUnlock Services List
iPhone & iPad Activation Lock Bypass
Use LetsUnlock iCloud Tool to bypass Activation Lock Screen on iPhone and iPad running on iOS version up to 14.6.Read More
MacOS iCloud Activation Lock Bypass
The LetsUnlock Mac iCloud Activation Lock Bypass Tool will help you to remove Activation Lock on an iCloud locked Mac which is stuck on Activation Lock Screen with no need to enter the correct Apple ID and password.Read More
Mac EFI Firmware Passcode Bypass
The LetsUnlock EFI Bypass Tool is a one button solution, which you click to start the EFI Unlock process. Bypass EFI with out password! Everything else does the software.Read More