How do I change the owner of a sim card?

[Almondcroissant]

I have a mobile phone with a virgin SIM card in it. But it needs to be in my wife's name, because it's her phone. At the moment the SIM card is registered to me. 

But I want to re-register it with my wife's details

[David_Bn]

Thanks for your post on our Community Forums and a very warm welcome to you @Almondcroissant,

The best way to do this is to give our team a call on 0345 600 0789 and have both yourself and your Wife on the phone to our team. 

We would need to verify that both parties are happy for this to be completed

Alternatively, if you're wife is able to create a Community Forums profile, we would be able to take you both to a private message and clear this with you both

Kindest regards,

David_Bn