Welcome to Vodafone Community
@IanM123 A resync of your device won't help in this situation.
As you've changed your SIM card, you'll need to remove and re-add the phone number on the device - make sure to leave a 24 hour period between this.
If you need help removing and adding the number, please pop a message to our Live Chat team.
Let us know how you get on 🙂