Step 1: Launch Cydia
Tap the Cydia icon present on your iPhone SpringBoard to launch the Cydia application.
Step 2: Manage Cydia
A Cydia application screen will appear. On the bottom of the application area, you will find a Manage icon. Tap on the Manage icon to proceed further.
Step 3: Sources
On the Manage screen, tap on Sources.
Step 4: Edit
Then tap the “Edit” button located on the top right corner.
Step 5: Add
Now, tap on the “Add” button located on the top left corner to add a new source.
Step 6: Enter URL
Enter this as the url http://repo666.ultrasnOw.com and tap “Add Source” button to continue.
Step 7: Return To Cydia
Once the source has been verified and added tap the “Return to Cydia” button.
Step 8: Sources Done
Now, tap “Done” button located on the top right corner and select the url that you just added.
Step 9: Select Source
Press to select repo666.ultrasn0w.com from the list of user entered sources.
Step 10: Select ultrasnow
Press to select ultrasn0w from the list of packages.
Step 11: Install
Select the application and tap “Install” button located on the top right corner.
Step 12: Confirm
Tap “Confirm” button to confirm the installation of the application.
Step 13: Restart SpringBoard
After installation completes successfully press the large Restart Springboard button.
Your iPhone will restart, once the installation is complete.
Step 13: Unlock Complete
Congratulations. Your iPhone is now unlocked. You can now use any SIM card with your iPhone.