How can I back up my iPhone unlock activation ticket?
If you're using the SAM package to unlock your iPhone, it's a good idea to backup your activation ticket to keep future unlocking options open. There are several ways you can back up the activation ticket, but thanks to a new Cydia package called Cookie the process is easier than ever.
1. Open Cydia and install Cookie. This can be found under Sections -> Utilities or by using the Search function.
2. Run Cookie and tap the Backup Activation button.
3. That's it! The app will notify you when the activation ticket backup is complete.
Redsn0w can also be used to back up activation tickets, or you can manually copy the folder /var/root/Library/Lockdown and its contents for safekeeping.