1. BLOCK: From the Messages app, select the Menu icon then select Settings.
   
2. Select Block messages.
   
3. Select Block numbers.
   
4. Enter the desired phone number, then select the Add icon.
   Note: To add a contact or phone number from your inbox or contacts list, select the corresponding options. The phone number will now appear in your Blocked numbers list.
   
5. UNBLOCK: Select the Remove icon next to the desired number you would like to remove.