The FCC is warning of an increase in one-ring robocalls. Scammers call you once, the hope you’ll be curious enough to call back.
A long-running hustle that is reportedly seeing a resurgence involves a scammer calling someone and then hanging up after just a couple of seconds. The perpetrator hopes that curiosity will prompt the person to call back. But doing so will result in expensive per-minute charges, leaving the caller with an expensive bill if the scammer succeeds in keep them on the line for any length of time.