they call, sit on the phone for a second, and then hang up. They may call back. When you call the number, the phone just rings or says all circuits are busy.
The person on the other end of the line said his name is Jason Allen and he is with the Grant Processing Center for the United States government. They said that they needed to "verify my personal information" because I was eligible for a $5000 grant because I had a good criminal history record. I knew this was a scam because of local BBB warnings by googling the number. I then became agressive on the phone and asked how he feels ripping people off etc and then he told me to "keep mum" while he explains what he needs from me. He had what seemed to be an Indian accent.
"James King" called and said we won 2.5 million dollars and a 2008 Cadillac. All we had to do was wire $150.00 to Floyd Francis in St. James Jamaica and make sure we keep the receipt to show to the "delivery guy" (from IPS Delivery Service, he said). Caller ID showed "Intl number" 1-876-344-2997. It's bogus too. Got a call a few minutes later from "Clay Barnes" the "delivery guy" wanting to deliver today! No caller ID info. When I asked for a return phone number, he wanted to know why. I told him I wanted to check him out. The call disconnected immediately.