NixringStop one ring scam calls on iPhone
One ring, then silence, from a country code you do not recognise. Calling back is the entire scam. Here is how the charge works and what actually shuts it off.
Free download. iOS 17.0 or later.
The mechanism
The missed call is the bait, the callback is the bill
The scheme is known as wangiri, which means one ring and cut. A machine dials thousands of numbers and hangs up almost immediately, leaving a missed call. The number it called from is a premium-rate line, and the fraudster earns a share of what your carrier charges you per minute to reach it.
Nothing is charged for the missed call itself. The cost only exists if you call the number back, which is why the call is designed to look interesting: an unfamiliar country code, at an odd hour, from a number that rang just long enough to register.
The whole defence is not calling back. If a call from abroad mattered, the caller will try again or leave a voicemail. Everything below is about making sure the same range cannot ring you a second time.
Already covered
The 30 prefixes in the built-in list
Callback bait clusters in a handful of country codes, because it needs a premium-rate range that international carriers still connect to. Thirty entries in the list every Nixring install starts with are drawn from these ten codes, three from each:
- +216Tunisia
- +223Mali
- +225Ivory Coast
- +233Ghana
- +234Nigeria
- +252Somalia
- +371Latvia
- +373Moldova
- +679Fiji
- +881Global mobile satellite service
- Total30callback-bait numbers, three per country code
Thirty numbers is a sample, not a wall. Each country code above has far more than three numbers available to a fraudster. What these entries give you is a starting point and a demonstration of the shape of the problem. Covering a whole range takes a prefix rule, which is explained on the range blocking page.
What to do
Three steps that end it
Do not call back, do not text back
A reply of any kind confirms the line is live and reaching a real person, which makes the next call more likely rather than less.
Add the number
Put the exact number into your blocklist so that line cannot ring you again. The free version of Nixring holds the first 10 numbers you add.
Ask your carrier about outbound blocks
Most carriers will bar outgoing calls to premium-rate and international numbers on request. That protects everyone using the phone, including someone who does call back by mistake, and it is free.
The callback-bait prefixes are in the free version.
Questions
Frequently asked
What is a one ring scam?
A call that hangs up after one or two rings so it leaves a missed call. The number belongs to a premium-rate line abroad. The whole scheme depends on curiosity: the cost only lands if you call back, and the fraudster takes a share of the per minute charge.
What should I do if I get one?
Nothing. Do not call back, and do not send a text. If the call mattered, the caller will try again or leave a voicemail. Add the number to your blocklist so the same line cannot try twice.
Does Nixring block one ring scam calls?
It blocks the 30 callback-bait prefixes in the built-in list, spread across ten country codes, and any number you add yourself. It cannot block a range that is not on your list, so a fresh number from a country code that is not covered will still ring once.
Can I block a whole country?
Not as a country, but you can cover a specific range with a prefix rule in Nixring Pro. That takes a prefix and up to 5 trailing digits, which covers up to 100,000 numbers in one entry. Blocking every possible number in a country is far beyond what any list can hold.
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