Inc.com reports that there are actually three versions of this scam now:
1. Scammer calls and hangs up before anyone answers.
2. Scammer waits for the victim to answer and plays a pre-recorded message of someone in an emergency situation and then hangs up.
3. Scammer sends a text message indicating that they are in trouble.
According to the FTC, some of the area codes that have possibly been linked to the one ring scam include: