How to Restore Your iPhone Unlock Ticket [SAM] ~ GSM−Forum Hosting Blog

These are instructions on how to restore your iPhone unlock ticket obtained using the SAM unlock method.

If you've unlocked with SAM but haven't backed up your unlock ticket, you should do so immediately by following this tutorial. To follow these instructions you will need to have the unlock ticket and iFile installed. You can get iFile from Cydia.

Step One
Insert your previously unlocked SIM card and make sure SAM is disabled in SAMPrefs.

Step Two
Email yourself the zip archive created when you backed up your unlock ticket. Open the email on your iPhone and tap to open the attachment. When prompted to select an application to open the attachment with choose iFile.

Step Three
When iFile opens it will ask you to choose between Zip Viewer and Unarchiver. Choose Unarchiver and tap the Done button when it's completed extracting.

Step Four
Tap the Edit button at the top right of the screen and select the Lockdown folder that was just extracted.

Step Five
Press the Clipboard button at the bottom right and choose Copy/Link from the popup menu. Then press the Done button at the top right of the screen.

Step Six
Use the back button at the top left of the screen to navigate to the /var/root/Library folder. Press the Edit button at the top right of the screen and select the Lockdown folder.