Welcome to Vodafone Community
Follow this link: Unlock your Phone If you scroll down to the last question on the link, you will see the answer to your question.
Vodafone phones have only one lock and are the easiest to unlock.
When you receive the code after 30 days use with an active PAYG Vodafone SIM, before entering the code type #7525*01# this will prompt to enter the NUC. Phone will then be unlocked.