As I mentioned several months ago, I didn't realize my phone number was on Facebook since my (now ex) wife had set it up for me. As soon as I deleted my number, a majority of the spam calls I was getting stopped. A few still pop up, but what I get now in a month is less than what I used to get daily.
I guess it could happen with putting your number anywhere on the web. Where have you put your number that you thought was harmless?
I had to print off copies of my health insurance card today. My insurance company's website would not let me proceed to the print your card page unless I gave them a number. I gave them 800-555-1212 which is long distance information. Let the phone company deal with scammers.
