How to Unlock with SAM Ticket on iOS 5.1.1 on iPhone4

Note : this tutorial apply for all kind of iPhone but i choose iPhone 4 in this tutorial.
AND BEFORE DOING THESE FOLLOWING YOU NEED TO BACKUP YOUR SAM UNLOCK TICKET WITH THIS TUTORIAL


1. Download required tools :

   - Redsn0w  Mac  Windows

   - Download firmware 5.1.1

   - Download Absinthe 2.0.2 Mac  Windows

2. iOS 5.1.1 Preserving baseband guide :

• Step 1: After downloading redsn0w, start it.
• Step 2: Go to Extras > Custom IPSW.
• Step 3: Choose the original IPSW 5.1.1
• Step 4: Now the custom IPSW file will be created by redsn0w, the one that has preserved the baseband meaning one will still be on the previous version (baseband).
• Step 5: Go to Extras > Pwned DFU to enter Pwned DFU mode. Follow the on-screen instructions.
• Step 6: Once there, go to iTunes and press Shift+Restore (Windows) or Option+Restore (Mac).You need to choose the correct IPSW file. It will have a prefix “No_BB”.
• Step 7: As it’s a tethered jailbreak, you need to boot tethered while it’s trying to reboot after restoration. To do that, go to Extras > Just Boot!
  
  

3. Untethered Jailgreak your iOS 5.1.1 :

• Double click to mount the downloaded dmg and drag the Absinthe application to your desktop.

• Double click to launch the Absinthe application from your desktop.

          

• As prompted, connect your iPhone to the computer via USB. Make sure to remove any passcodes or VPN settings you've previously set.

• Click the Jailbreak button to begin

• The application will take you through several steps to jailbreak including: beginning jailbreak, sending initial jailbreak data, sending final jailbreak data, waiting for reboot, and waiting for process to complete.

• You will be informed that the jailbreak is 'Done'. 

• In a few moments you will notice Cydia appear on your Springboard!

            


After that follow this tutorial to restore SAM unlock ticket .