Silent CallHas this been happening to you? The phone rings, you pick it up, say "hello," but there's no one on the other line. It's a new type of robocall — an automated computer system making tens of thousands of calls to "build a list of humans to target for theft," according to the Financial Fraud Research Center. It's the first step in opening you up to many of the phone-based scams discussed in this article.
Curiosity ConThe one-ring rip-off Criminals sometimes program auto-dialers to make repeated calls to you, each disconnecting after just one ring. They know this might spur you into calling back the displayed number to complain. There’s double trouble if you call area codes such as 268, 664 and 876. These are for Caribbean countries and other places that have high per-minute phone charges. One scam involves getting you to call one of those numbers, then getting you to hold through transfers that rack up your bill until a scammer gets on the line and starts a fraudulent pitch.
Reference:
https://www.aarp.org/money/scams-fraud/ ... avoid.html