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

Samsung Galaxy J8 Samsung Galaxy J8
Samsung Galaxy J6 Samsung Galaxy J6
Samsung Galaxy J4 Samsung Galaxy J4
Samsung Galaxy A6+ (2018) Samsung Galaxy A6+ (2018)
Samsung Galaxy A6 (2018) Samsung Galaxy A6 (2018)
Samsung Galaxy J7 Duo Samsung Galaxy J7 Duo
Samsung Galaxy J7 Prime 2 Samsung Galaxy J7 Prime 2
Samsung Galaxy S9+ Samsung Galaxy S9+
Samsung Galaxy S9 Samsung Galaxy S9
Samsung Galaxy J2 Pro (2018) Samsung Galaxy J2 Pro (2018)
Samsung Galaxy A8+ (2018) Samsung Galaxy A8+ (2018)
Samsung Galaxy A8 (2018) Samsung Galaxy A8 (2018)
Samsung Galaxy J2 (2017) Samsung Galaxy J2 (2017)
Samsung Galaxy C7 (2017) Samsung Galaxy C7 (2017)
Samsung Galaxy Note8 Samsung Galaxy Note8
Samsung Galaxy S8 Active Samsung Galaxy S8 Active
Samsung Galaxy J7 V Samsung Galaxy J7 V
Samsung Galaxy Note FE Samsung Galaxy Note FE
Samsung Galaxy Xcover 4 Samsung Galaxy Xcover 4
Samsung Galaxy C5 Pro Samsung Galaxy C5 Pro