1. From the home screen, tap Messages.
   
2. Tap the Menu icon.
   
3. Tap Settings.
   
4. Tap Spam filter.
   
5. Tap the Spam filter switch to toggle the spam filter on and off.
   
6. Tap Add to spam numbers.
   
7. To add a number to the block list, tap the Add icon.
   
8. Tap the Number field to enter the desired phone number.
   
9. Tap SAVE.
   
10. To delete a number off your block list, tap the Delete icon.
    
11. Tap the desired number(s).
    
12. Tap the Delete icon.
    
13. Tap OK.