BLOCK: From the home screen, select the Phone app. Select the Menu icon, then select Block numbers.
Select ADD A NUMBER. Note: To quickly block messages from a number that has called you, select the Info icon besides the desired number> Block number > BLOCK.
Enter the desired phone number, then select BLOCK. Note: The phone number will now appear in your Blocked numbers list.
UNBLOCK: To remove a number from the Blocked numbers list, select the Remove icon then select UNBLOCK.