Ok @thriller24
You'll need to request it's unlock via > How-do-I-unlock-my-phone-or-tablet-to-use-on-another-network.
Just to also advise....
An iPhone is not unlocked via inputting an unlock code but instead is unlocked via Apple and their Database.
Vodafone would email you to confirm it's been requested after accepting your unlock request. (Check Spam Inboxes too)
Apple then can take occasionally approximately up to 30 days sometimes to complete an unlock request made by a Network.
Periodically insert an active Non-Vodafone Sim Card in the iPhone and hook up to iTunes.
From the iPhone 5 onwards there's not normally the need to hook up to iTunes to complete the process.
Current Phone >
Samsung Galaxy s²³ Ultra 512gb Phantom Black.
