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 rejection.
Tap Auto reject list.
To add a number to the Auto reject list, tap the Add icon.
Enter the desired phone number, then tap SAVE.
To remove a number from the Auto reject list, tap the Delete icon.