Welcome to Vodafone Community
May I ask...
What model.of phone are you unlocking ?
Are you using a different networks sim card that's activated i.e. connects to mobile data etc ?
Are you currently in the UK @SUNITHA11 ?
Current Phone > Samsung Note 9 _512Gb > Model: SM-N960 Hybrid-Duos.
Samsung One Ui / Pie.
Samsung Gear s3 Frontier Watch.