From the home screen, swipe down from the top of the screen to reveal the Action center. Note: The call blocking feature may not affect phone calls made or received via third-party apps installed on your device. Please contact third party app developers for assistance with such applications.
Tap ALL SETTINGS.
Scroll to, then tap call+SMS filter.
Tap the Windows key to return to the home screen.
Tap the Phone icon.
Touch and hold the desired entry.
Tap block number.
To remove a phone number from the block list, tap the menu icon.