Fully paid for devices will not unlock says Your account hasn’t been active for at least 60 days.
Not sure why this matters as these devices were purchased outright and have no balance on them. I got this message on one phone 2 different times I tried to unlock it. Then on the third time it provided me the unlock code after previously denying it 2 different times saying that the account hasn't been active for at least 60 days. I think this is an error with the unlock server.