I gave my cell phone number out on a form I filled out online - I know, I know... I knew almost immediately my mistake, but I wasn't thinking and there you go.
Today, I've started to get calls from the same 800 number. I'm getting pretty annoyed at this (I answer and no one says anything) so I decided to look into blocking this particular caller.
I found out that AT&T offers a service that this would be included in, but it's an extra $5 / month. I didn't want to do that, so I did this:
I added the number as a contact in my phone. Its name is: "Spam! Don't Answer!" I even gave it the personalized ringtone of: "Silent".
I'm actually hoping they will call back again so I can see if it works!! It should... :o)
Hopefully, if this ever happens on your cell phone you can do the same thing.