You should Google unknown phone numbers before calling them, because there are a lot of shady people out there. This isn't guaranteed protection, but a lot of times if they're a habitual scammer, their number will show up on Mr. Number, Dirtyphonebook, 800notes, or other similar sites with some info about them.
You'll be amazed at how spammers operate and how often they succeed. I tried to warn my father about answering unknown numbers, but he was one of the ones stupid enough to fall for the "Microsoft called me to fix my computer" scam. (the only reason it didn't work is that he couldn't figure out their instructions to give them his credit card, but he was trying to) :(
You'll be amazed at how spammers operate and how often they succeed. I tried to warn my father about answering unknown numbers, but he was one of the ones stupid enough to fall for the "Microsoft called me to fix my computer" scam. (the only reason it didn't work is that he couldn't figure out their instructions to give them his credit card, but he was trying to) :(