How can I block another person's number so he can't call me or text me?
In order to block a phone number, you will need to go to your phone company's website. Second, you will need to confirm their rules on this matter then proceed to using the blocking code. For further instructions, check http://www.ehow.com/search.html?q=How+to+block+a+number+on+the+phone&skin=family&t=all.
Call and ask you're phone carrier
Change your phone number