Calls that ring once and hang up: the wangiri scam

Calls that ring once and hang up: the wangiri scam

Your phone rings once, you look at the screen and the call has already ended. The number is unknown, often with a foreign code you do not recognise. The immediate impulse is to call back: what if it was important? That impulse is exactly what the person on the other end wants. It is the missed-call scam, known as wangiri (Japanese for "one ring and cut"), and it has worked for years because it exploits the most basic curiosity.

How wangiri works

The mechanics are simple, which is why they work:

1. An automated system calls thousands of numbers and hangs up after one or two rings, before you can answer.
2. You see a missed call from a number you do not know. Many of these numbers carry unusual international codes: +216 (Tunisia), +355 (Albania), +675 (Papua New Guinea) or satellite numbers starting with +881 or +882.
3. If you call back, you are connected to a high-cost international or premium line: recordings designed to keep you on the line as long as possible (surveys, prizes, recorded messages) while the meter runs.
4. Every minute eats into your airtime or adds to your bill, and part of that money goes to the scammer. By the time you notice, there is little left that is easy to claim back.

There is a variant that is not after the call cost but checking that your number is live: by calling back you confirm that your line is active and that a real person answers, and your number becomes more valuable in the lists sold to telemarketers and scammers. It is the same goal as silent and hang-up calls (see our situations guides), except that here you are the one making contact.

The signs that give it away

• One ring, then nothing, from a number you do not know. A friend may flash you to get a call back, but a stranger has no reason to: wangiri needs you NOT to answer, so it cuts the call on purpose.
• An unknown international code. If you are not expecting calls from abroad, a code you do not recognise is reason enough not to call back.
• Odd hours. Many waves are launched late at night or early in the morning, when you are most likely to miss the call and see it when you wake up.
• Repetition in waves. If you get several similar missed calls within a few days, it is an active campaign, not a coincidence. The spam numbers directory shows which numbers other people are reporting.

What to do (and not do) about a suspicious missed call

The right response fits in three steps:

1. Do not call back. If it were important, they would call again or send a message. No bank, government agency or serious company works with one ring and a hang-up.
2. Check the number before doing anything. Look it up in the spam numbers directory: wangiri reuses numbers for days, and often other people have already reported it with the code and the trick identified.
3. Block and report. If it is wangiri, your report turns your missed call into a warning for the next person.

And what not to do: do not call "just to see who it was", not even for a minute. A single minute on one of these lines can cost far more than a normal call, and the recording is designed to stop you hanging up.

Can I be charged for a call I did not answer?

No. While you are in Nigeria, receiving a call and not answering it never costs you anything, whatever country it comes from. The wangiri risk is only in calling back. In the same way, answering one of these calls does not cost you anything either (the caller pays); the danger starts if they ask you to call another number "to continue". That is the same trap with an extra step.

Quick questions

What if I called back without realising? Hang up as soon as you suspect something, check how long the call lasted and call your network's customer care to ask about the cost and whether they can bar international or premium calls on your line. If you were charged, complain in writing; if your network does not resolve it, the NCC complaint procedure lets you escalate to the Nigerian Communications Commission (NCC) on its toll-free 622 line or through the NCC consumer portal. Be aware that a refund is not guaranteed.

Does blocking the number help? Against that particular number, yes. But campaigns rotate numbers, so blocking is only a partial fix: the real protection is the habit of never returning unknown missed calls from strange codes.

Does this only happen to mobiles? In Nigeria, mostly yes, because fixed lines are rare. If an older relative uses a basic phone, it is worth giving them the rule in one line: "missed call from a strange number = do not call back".

If you have had one of these missed calls, look it up in NoCall's spam numbers directory and report it: every report helps the next person who sees that number on their screen know not to call back.