TechCrunch wrote: "The people who read our site are a pretty savvy lot. You know not to accept checks from distant princes. You can spot a phisher from a mile away. But here’s one that might be new for you: scammers are apparently trying to exploit your “missed call” screen, now. The scam, simplified: They call you, but immediately hang up. You see a missed call. You call back. They charge you for the call, and for each minute they can keep you on the line. According to the BBB, this so-called “One Ring” scam is on the rise."
Calls typically originate from outside the United States. One woman told BBB her caller ID indicated the call originated in Antigua or Barbuda (area code 268). Other consumers across the country report calls from the Dominican Republic (809), Jamaica (876), British Virgin Islands (284) and Grenada (473). Here is the story at TechCrunch, it's a new social engineering attack that you should not fall for.