1. From the home screen, tap Messaging.
   
2. Press the Menu key.
   
3. Tap Settings.
   
4. Scroll to then tap Spam settings to toggle message blocking features on/off.
   
5. With Spam settings enabled, tap Add to spam numbers to edit the list of blocked numbers.
   
6. To add a number to the block list, tap the Add icon.
   
7. Enter the desired phone number, then tap Save.
   
8. To remove a number from the block list, touch and hold the desired number.
   
9. Tap Delete.
   
10. Tap OK.