Call Filter (formerly Caller Name ID) provides you with additional caller detail (e.g., city, state, name, etc.) and enables you to manage and block spam calls.
From a Home screen, navigate: Apps > Call Filter .
Tap the Menu (upper-left).
Tap Recent activity.
Tap a 10-digit phone number from the list.
Tap Mark as spam.
Select an option then tap Confirm.
Don't Answer
None
Custom
Select a category (e.g., Scammer, Telemarketer, etc.). If you don't want to report the number tap Skip.
If desired, enter a message about the number being blocked.