From the home screen, tap Phone. 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.
Press the Menu key.
Tap Call settings.
Tap Call rejection.
Tap Auto reject mode.
Tap the desired option.
Tap Auto reject list to add a new number or contact to the reject list. Note: To quickly add a phone number or contact to the call reject list, tap and hold a call log, and then select Add to reject list.
Tap Create to add a number to the auto reject list.
Enter the phone number, then tap Save.
To remove a number from the reject list, tap the desired number then tap the Delete icon.