1. From the Start screen, tap the Messaging icon.
   
2. Touch and hold the desired recent text message thread.
   
3. Tap block number.
   
4. Tap the Save icon.
   
5. Tap ok.
   
6. To unblock a number, tap the More icon from the Messaging screen.
   
7. Tap blocked messages.
   
8. Tap the More icon.
   
9. Tap settings.
   
10. Tap view blocked numbers.
    
11. Tap the Selection icon.
    
12. Tap the desired number(s).
    
13. Tap the Delete icon.
    
14. Tap ok.
    
15. Tap ok.