Hi ​@K8te, 

We’re sorry to hear you’re having trouble adding the second SIM Only plan to your account.

If the system is advising that your details do not match the record, this will need to be checked by our Customer Services Team, as they can review the account information and confirm what details are currently registered.

Please contact us via Live Chat or send us a direct message through our social media platforms, and a member of the team will be able to investigate this further and help get it resolved for you.

Owethu