Want to avoid scammers calling your house? Use caller ID and don’t answer the phone. But it’s not always possible to figure out who’s calling. So what’s the answer? Use one of the new FREE call-screening services available for land and mobile phones. A few that are getting good consumer reviews are Nomorobo, PrivacyStar and Truecaller. These services will either identify a caller as a spammer or simply block all known spam numbers. Curious about a number left on your caller ID? You can do a reverse phone number lookup at White Pages that will tell you if spam activity is associated with that number. For more on this topic, read the story on our sister site, Living on the Cheap.