Hi there @Zoe152 👋 Welcome to the forum and thanks for your post 😊
Sorry to see you are having issues accessing mobile data on your new handset 😔 We will certainly be happy to help with this.
I have checked our systems and cannot see any obvious reason as to why you are having issues using your mobile data 🤔 Just to confirm, is this handset from us? If not, have you been able to check you have the APN settings correctly set up on the handset? You can find information here on how to set this up on specifically on the handset you have.
If that does not help with your issue it would be best to take a look at our phone fix page here for further support.
If you still need help with this after checking the above, please let us know. We will be happy to assist.
Regards
Nathan
