Samsung SM-S975LZKATFN - Manual (Page 80)

Adding numbers to the rejection list
Entries can be added to the list via either the Contacts menu or via
the Auto reject list menu. The Contacts menu option assigns all
numbers for an individual as rejected. The Auto reject list allows to
assign individual numbers.
To assign multiple numbers as rejected via Contacts:
1. From the Home screen, tap (Contacts).
2. Locate an entry and tap it to open the Contact Overview
Screen.
3. Press and then tap Add to reject list. All phone numbers
associated with this entry are then added to the reject list.
To assign single number as rejected via Auto reject list:
1. From the main Call settings page, tap Call rejection ➔
Auto reject list.
2. Tap (Create) and either enter the phone number or select
a Contact from your Logs or Contacts list.
3. Tap Save to complete the assignment.
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