What does the thread title "FYA" mean?
Is you want additional SIM cards then you need to go through the same process as you did for the first one except using different email addresses for each order.
Unlike some other mobile providers 48 doesn't support family/group accounts where multiple SIMs/contracts can be managed using one login.
With 48 every SIM/account requires its own login email address and password.
If you need to contact 48 support about this then see the links in my signature below.
