Can i block a number from my Nokia 6151?

I'd like to block a number from my phone - Anyone know if it's possible and if so, how to do it? If not, is it difficult to change your phone number? I'm on a pay monthly contract. Thanks!Can i block a number from my Nokia 6151?you can not block any number on your Nokia 6151. If you are having any trouble with that number you can contact your network providers customer care and tell them they will block it.