U Mobile blocks 265 million scam attempts with Cellusys network-level scam protection
U Mobile, Malaysia’s first telco to deliver network-level scam protection, successfully blocks over 265 million attempts with Cellusys
- Powered by Cellusys’ advanced firewall technology, the initiative began in February 2025, making U Mobile the first telco in Malaysia to provide full-scale scam protection at a network level
- As of December 2025, U Mobile has blocked over 265 million scam calls and fraudulent SMS nationwide across its 5G and 4G network, preventing these threats before they even reach customers
- The initiative highlights U Mobile’s commitment to safeguarding customers as well as strengthening national digital resilience, supporting Malaysia’s efforts to combat digital fraud and scams to protect consumers
Kuala Lumpur, 29 December 2025 – U Mobile, Malaysia’s newest 5G network provider, is the first telco in the country to enable full-scale scam protection across its entire network. Operating in full scale since February 2025, the initiative is in partnership with Cellusys, an award-winning signalling security, roaming and analytics solutions provider, and has successfully protected U Mobile’s customers from a total of 265 million scam calls and fraudulent SMS attempts to date.
Leveraging Cellusys’ Unified Signalling, SMS and Voice Firewall solution, U Mobile has been able to block scam attempts at a network level, which means that unlike generic filters, all inbound calls and inbound SMS are screened through the solution first and if suspicious, are blocked before they even reach customers’ devices. The solution has protected U Mobile customers from scam calls impersonating authorities and institutions, SMS phishing attacks (smishing), spoofed or manipulated caller identities and high-volume criminal campaigns targeting Malaysian consumers.
“At U Mobile, we are committed to safeguarding our customers against fraudulent activities, which is why we took a proactive step to embed the advanced scam protection solution from Cellusys directly into our network as a core security capability available to all customers. We’re proud to be the first telco in Malaysia to launch a full-scale network-level scam protection and our efforts have delivered tangible results, with over 265 million scam calls and fraudulent SMS blocked, to date. We will continue to improve our network through technology to better protect customers across voice, messaging and data services. As we expand our next generation 5G network nationwide, security remains a core priority, because trusted connectivity is essential to a resilient Malaysian digital economy.”
Woon Ooi Yuen, Chief Technology Officer, U Mobile
“U Mobile’s leadership in protecting its customers sets a powerful benchmark for Malaysia and the wider region. We are proud that Cellusys technology is the engine behind this nationwide protection, operating with the accuracy, resilience, and scale required to stop scams before they reach consumers. This deployment demonstrates what can be achieved when operators commit to proven, real-world defences rather than future roadmaps.”
Brendan Cleary, Chief Executive Officer, Cellusys
According to the Global Anti-Scam Alliance*, 73% of Malaysians have reported experiences with scam calls and fraudulent SMS, which is one of the highest in the Southeast Asian region, with criminal groups increasingly targeting households, senior citizens, and vulnerable individuals. Cellusys’ advanced signalling-intelligence platform analyses traffic at the authoritative network layer to detect anomalies and fraudulent behaviours with high precision. Leveraging behavioural and signalling-layer detection tuned to Malaysian threat patterns, it provides deep visibility across voice and messaging channels, ensures high accuracy with minimal false positives, continuously adapts to evolving fraud tactics, and delivers proven reliability at national scale for operators worldwide.
To learn more about scam prevention, visit U Mobile Scam Awareness.
*The Global Anti-Scam Alliance (GASA) is a global non-profit uniting governments, technology, finance, and consumer groups to fight scams through intelligence sharing, tools, training, and awareness.
About U Mobile
U Mobile is a trusted name in the telco industry, known for its innovative mindset and network capabilities. As Malaysia’s newest 5G network provider, the company delivers the ULTRA5G experience through its next gen 5G network that is enterprise grade, providing unbeatable converged solutions and unparalleled customer experience. U Mobile is committed to driving adoption and fostering digital transformation, with the vision to be Malaysia’s favourite digital services partner by delivering innovative solutions that constantly make things possible.
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About Cellusys
Cellusys provides award-winning signalling security, roaming, and analytics solutions to mobile operators globally. Trusted by Tier 1 networks and groups across 180+ countries, Cellusys empowers operators to deliver safer, smarter, and more reliable connectivity. www.cellusys.com
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