Unlocking your iPhone from Three
  Three Unlock  
  $29  
 
Select Your iPhone Model
Enter IMEI Number:

IMPORTANT: Please ensure the correct IMEI Number is entered and iPhone Model is selected. There are no refunds for incorrectly entered data

Your IMEI number is a 15-digit number unique to your handset.
You can find your IMEI number in the Settings > General > About screen, or by dialling *#06# If you cannot access this screen, then simply eject the sim tray on your iPhone. The IMEI will be printed on the sim tray - but please be aware that sim trays are sometimes switched.