These are instructions on how to save your iPhone unlock ticket using RedSn0w after unlocking with SAM. It’s very important you do this to ensure continued unlock of your SIM in the future.
If you haven’t already unlocked using SAM, you can follow this unlock tutorial.
Download the latest version of RedSn0w from here.
Double click to extract the downloaded archive.
Launch the RedSn0w application from within the extracted folder.
Choose Extras from the main menu.
Choose Even More from the extras menu.
Choose Backup from the even more menu.
Ensure your path to backup is /var/root/Library/Lockdown, connect your iPhone to the computer via USB, and click OK.
**If you get a backup failed message you will need to open Cydia and install the afc2add package from the System section.
Your Lockdown folder will now be saved to the RedSn0w folder.
Copy this archive somewhere for safe keeping!