Can I block a number on my AT&T iPhone 4s?

Can I block a number on my AT&T iPhone 4s?

Yeah, just call att and tell them your problem and the number and they will do it for you. I had the same problem, but they told me they could only block it for 3 months because by then, the person would probably stop. You might have to enter in some other info, but its not to difficult. Hope it helps

Yes. Call AT&T and ask them to block whatever number you don't want contacting you. However, the number doesn't actually get blocked for like six weeks after you ask them to do so. Stupid AT&T.