Dr Rasha Kassem, senior academic and leader of the Fraud Research Group at Aston University, said: “The launch of the “blocked SIMs” programme by the cross-industry coalition Stop Scams UK represents an important evolution in how the UK is tackling organised fraud.
“For years, criminals have exploited the relative anonymity and low cost of pay-as-you-go (PAYG) SIM cards to industrialise deception.
“By using large volumes of UK-registered numbers, fraud criminals have been able to generate thousands of seemingly legitimate online profiles that underpin investment fraud, romance fraud and many other fraud schemes targeting British consumers.
“What makes this initiative particularly significant is its recognition that fraud is not confined to a single sector.
“Telecommunications networks, financial institutions and technology platforms have historically addressed the issue within their own systems.
“In reality, the criminal ecosystem spans all three.
“Fraud criminals acquire SIM cards from telecom providers, use them to create identities on social media or messaging services, and ultimately monetise their activity through banking channels.
“Disrupting that chain requires coordinated intervention across each stage.
“The blocked SIMs programme targets one of the most scalable elements of that infrastructure: the mass acquisition and activation of UK phone numbers.
“Requiring PAYG SIM users to load credit before receiving SMS verification introduces friction and increases the cost of creating fake accounts at scale.
“Combined with improved detection systems on technology platforms and intelligence sharing between industries, this approach aims to identify suspicious patterns earlier and disrupt criminal activity before victims are reached.
“However, while collaboration between telecoms operators, financial institutions and technology companies is essential, it is unlikely to be sufficient on its own.
“Fraud networks are highly adaptive and often operate internationally, meaning criminals can quickly shift to alternative tools such as foreign numbers, VoIP services or compromised accounts.
“Data-sharing frameworks, regulatory constraints and differing operational priorities can also limit how quickly threats are identified and addressed.
“This is where fraud researchers can play a valuable supporting role.
“Independent researchers and academic teams often analyse fraud ecosystems across multiple platforms and jurisdictions, helping to identify emerging tactics, map criminal infrastructure and evaluate whether interventions genuinely reduce fraud or simply displace it elsewhere.
“Ultimately, tackling fraud requires a layered approach combining industry collaboration, law-enforcement capability, international cooperation and independent research.
“Initiatives like the blocked SIMs programme represent a strong step forward in disrupting criminal infrastructure, but sustained progress will depend on maintaining this broader, multi-stakeholder effort.”
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