1. From the home screen, tap Messaging.
   
2. Tap the Menu key.
   
3. Tap Settings.
   
4. Scroll to "Spam message settings", then tap Register number as spam.
   
5. Tap the Add icon to add a number/contact to the Spam filter.
   
6. Enter the desired number or contact, then tap Save.
   
7. Touch and hold a number/contact to remove it from the Spam filter, then tap Delete.
   
8. Tap OK.
   
9. Tap the Spam settings checkbox to disable the Spam filter.