You glance at your phone. There's a missed call from a number with a country code you don't recognize. +355 Albania. Or +234 Nigeria. Or +1-473 Grenada. Just one ring. You're curious - who would call you from there?
You call back. The line connects. Hold music plays. Maybe a recorded message in a language you don't speak. You hang up after a minute, confused.
A few days later, you find a $25 charge on your phone bill. That was the wangiri scam.
The word is Japanese: wan giri - "one (and) cut." It describes the entire mechanic. The scammer calls and hangs up after one ring. The scam is in the callback.
Here's why it works: the number you call back isn't a regular international line. It's a premium-rate service registered in a country with weak telecom regulation. Calling that number can cost anywhere from $5 to $20 per minute, with the revenue split between the telecom carrier and the scam operator.
Modern wangiri operations are automated. Bots dial millions of numbers per day, log the missed calls, and wait for the small percentage who call back. Even a 0.1% callback rate on a million calls is 1,000 charged callbacks per day.
Wangiri scams cluster in specific country codes that have weak telecom oversight or are part of international premium-rate schemes. Common offenders include:
The NANP examples are the trickiest. Because Grenada, Bahamas, and a dozen other Caribbean countries share the +1 prefix with the US, the missed call looks like a normal American number. Many Americans don't realize they've made an international call until the bill arrives.
A single 60-second callback to a wangiri number typically charges between $5 and $25. Some operations charge per-minute rates as high as $30. There are documented cases of victims being charged hundreds of dollars after holding through a long automated message thinking they were waiting for a real person.
The worst part: most carriers won't refund these charges, because the call technically went through and was completed normally. The premium-rate billing is legal in the country it originated from.
The wangiri scam works because we're naturally curious about missed calls. The defense is the same as for most phone scams: assume the worst about any call from an unknown international number, and act accordingly.