By Adam Weir  
Product Expert, Fraud Solutions

Organizations worldwide are discovering that their most trusted security layer — mobile two-factor authentication — has a critical weakness. SIM swap fraud exploits this vulnerability, allowing criminals to hijack phone numbers and bypass SMS-based security in minutes. The solution? Proactive SIM swap detection that identifies suspicious mobile activity before accounts are compromised.

## **What is SIM swap fraud?**

SIM swap fraud, also known as SIM hijacking or port-out scam, occurs when criminals trick your mobile carrier into transferring your phone number to a SIM card they control. Once successful, they intercept all your calls and text messages, including critical two-factor authentication (2FA) codes used to protect your accounts.

This attack exploits a legitimate feature that carriers offer when customers lose their phone or switch devices. But in the wrong hands, it becomes a master key to your digital life.

## **The alarming growth of SIM swap fraud**

The scale of SIM swap fraud has exploded globally. Per an [Efani report on 2026 fraud statistics](https://www.efani.com/blog/sim-swap-fraud-statistics-2026 "Link goes to the Efani page about 2026 SIM swap fraud statistics. The page opens in a new window."):

- The FBI's Internet Crime Complaint Center (IC3) received **982 complaints** in 2024, resulting in **$26 million in reported losses**.  
- In Australia, the IDCARE reported a **240% increase** in people seeking help for SIM swap and phone porting fraud in 2024. Alarmingly, **90% of these attacks occurred without any victim interaction**.

The [Cifas Fraudscape 2025 report](https://www.cifas.org.uk/newsroom/huge-surge-see-sim-swaps-hit-telco-and-mobile "Link goes to the Cifas page with highlights from the Fraudscape 2025 report. The page opens in a new window.") also notes that:

- The UK experienced a staggering **1,055% surge** in unauthorized SIM swaps in 2024, with total losses exceeding **£5.35 million**.

While anyone can become a victim, the data reveals concerning patterns:

- **Older adults** are disproportionately affected — victims aged **60 and over** suffered the highest financial losses, totaling **$6.3 million** according to FBI data.  
- **Cryptocurrency holders** represent **35% of high-value SIM swap targets**, with individual losses sometimes reaching millions (source: [CoinLaw — SIM Swapping Statistics 2026: How to Stay Safe](https://coinlaw.io/sim-swapping-statistics/ "Link goes to the CoinLaw page about 2026 SIM swapping statistics. The page opens in a new window.")).

The financial and personal impact of SIM swap fraud cannot be overstated. In March 2025, T-Mobile was ordered to pay [**$33 million**](https://coinlaw.io/sim-swapping-statistics/ "Link goes to the CoinLaw page about 2026 SIM swapping statistics. The page opens in a new window.") in an arbitration case after a SIM swap enabled thieves to drain a customer's cryptocurrency wallet. This landmark decision set a powerful precedent for carrier liability. Australian carrier Exetel was fined [**$695,000**](https://coinlaw.io/sim-swapping-statistics/ "Link goes to the CoinLaw page about 2026 SIM swapping statistics. The page opens in a new window.") after **73 SIM swaps** enabled **$412,000 in fraud**, demonstrating regulatory consequences for inadequate security.

Network APIs vs. Fraud

Reducing Toll Fraud and SMS Risks via Network-Powered APIs

Fraud attacks continue to rise. This paper explores how network-powered APIs can support customer identification and authentication, helping to reduce fraud risk, protect brand reputation, and ensure data safety.

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## **The Vonage solution: Identity Insights API with SIM swap detection**

As enterprises seek to protect their customers from this growing threat, technology solutions are essential. [**Vonage Identity Insights API**](https://www.vonage.com/communications-apis/identity-insights/ "Link goes to the Vonage Identity Insights API page. The page opens in the same window.") provides businesses with powerful network-powered tools to detect and prevent SIM swap fraud before it results in account compromise.

The **SIM swap detection feature** within Vonage Identity Insights API allows businesses to:

- **Check if a number has been recently swapped** before processing sensitive transactions  
- **Implement risk-based authentication** that flags recent SIM changes  
- **Reduce fraud losses** by identifying suspicious activity patterns  
- **Improve customer security** without adding friction to legitimate user experiences

By integrating SIM swap detection directly into authentication and transaction workflows, enterprises can make informed risk decisions at the moment of truth — blocking fraudulent activity while maintaining seamless experiences for legitimate customers.

### Learn how to deploy Vonage SIM swap detection using Identity Insights API.

[Get started](https://developer.vonage.com/en/identity-insights/guides/sim-swap)