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 icon (upper-left).
Tap Block management.
Tap Spam filter.
Tap the Auto-block spam filter switch to turn it on or off.
Select an option then tap the back arrow to save the setting: