How to block, mark as spam, or unblock phone numbers on Nokia devices

Nokia 3.1 Nokia 3.1
Nokia 2.1 Nokia 2.1
Nokia 8 Sirocco Nokia 8 Sirocco
Nokia 7 plus Nokia 7 plus
Nokia 6.1 Nokia 6.1
Nokia 1 Nokia 1
Nokia 2 Nokia 2
Nokia 7 Nokia 7
Nokia 8 Nokia 8
Nokia 6 Nokia 6
Nokia 5 Nokia 5
Nokia 3 Nokia 3