Welcome to Vodafone Community
I have my unlocking code but when I follow the instructions I get "not registered on network" and it doesn't unlock.
Are you using an activated alternative network sim card @wyssik ?
i.e. it connects to mobile data etc.
And are you currently in the UK ?
Current Phone > Samsung Note 9 _512Gb > Model: SM-N960 Hybrid-Duos.
Samsung One Ui / Pie.
Samsung Gear s3 Frontier Watch.