Yes, there are Premium accounts, but these accounts are rare and not anyone can have them. Theoretically, there is a section in the EULA where there is some information provided about Premium Accounts/Services, but they're subject to change might not be always available.
However, your account should turn Premium when you add Funds to use the Out-Call feature.
More info here: http://www.icq.com/calls/payment-methods/en
