Do I need more than one BankID?
Basically, you only need one BankID, as one and the same BankID can be used across banks and all user sites. However, if you wish, you can get a BankID from all the banks in which you have customer relationship.
Many people also want to have BankID on mobile in order to log in without a bank code chip. You enable BankID on mobile in your online bank.