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.
Tap the Menu icon.
Tap Settings.
Tap Call.
Tap Call rejection.
Tap Auto reject list.
To add a number to the blocked calls list, tap the Add icon.
Enter the desired number, then tap SAVE to add the entered number to the block list.
To remove a number from the Auto reject list, touch and hold the desired number.