1. From the home screen, tap Phone.
   
2. Touch and hold the desired number in the Call Log.
   
3. Tap Add to block list.
   
4. Tap OK.
   
5. To unblock a number, tap the Menu icon.
   
6. Tap Block list.
   
7. Touch and hold the desired number.
   
8. Tap Remove from blocked list.
   
9. Tap OK.