Lately I've been getting quite a few unknown numbers calling me. I usually don't answer them as I don't feel like talking with somebody I don't know who wants me to sign up for something, pay money to something, tell me my Acura is late for its tuneup (I don't own a car)... so I now instead google the number after I get a call. It's worked wonders as there are a couple sites out there that are providing forums for this type of problem. Surprisingly quite a few people have received calls from the same numbers I receive calls from. So next time you don't recognize the number, don't answer it, and just google it. Chances are it's some sort of telemarketer.