Cellusys Blog

Meet Queen-Monica Meet Queen-Monica Meet Queen-Monica

March 8, 2026

Meet Queen-Monica

Q: What are you studying at the moment?I’m studying Computer Science at DCU. I’m in third year. Q: Before starting the internship, what did you expect it would be like?I knew the company works with mobile networks, so I expected something very network-focused — maybe working with things like C or C++. I was preparing… View Article

MWC26 Reflections MWC26 Reflections MWC26 Reflections

Daniel McTague

March 5, 2026

MWC26 Reflections

Over the past three days at MWC26 we covered a wide range of themes — from AI and network evolution to security, post-quantum cryptography, eSIM, MVNOs and Open APIs. Stepping back, a few broader patterns emerge. The most obvious is AI’s dominance. It appeared in almost every conversation, whether the topic was 6G, security, customer operations… View Article

MWC26 Day 3 Recap MWC26 Day 3 Recap MWC26 Day 3 Recap

Daniel McTague

March 4, 2026

MWC26 Day 3 Recap

Today’s focus was eSIM, MVNO and Open APIs. We tried to steer away from AI — no chance. Some takeaways: eSIM The main theme around eSIM was progress. Compared to previous MWCs, the shift is visible. Sessions focused less on projections and more on real-world challenges. eSIM has moved from promise to delivery. Some figures… View Article

MWC26 Day 2 Recap MWC26 Day 2 Recap MWC26 Day 2 Recap

Daniel McTague

March 3, 2026

MWC26 Day 2 Recap

Today we shifted our focus to security and, as expected, much of the discussion led back to AI. Sovereignty again featured heavily, emerging as the clear secondary, more grounded theme of the event. We also touched on post-quantum security, a topic gradually gaining prominence beneath AI’s shadow. And we listened directly to several sessions focused… View Article

MWC26 Day 1 Recap MWC26 Day 1 Recap MWC26 Day 1 Recap

Daniel McTague

March 2, 2026

MWC26 Day 1 Recap

No surprise – AI is everywhere at MWC. As ever, it’s hard to separate real value from buzzword bingo. Today the Cellusys team focused on network evolution rather than AI (we’ll cover AI in more detail in the coming days). In reality, almost every discussion around 5G, 6G, and network evolution leads to AI. Fair enough,… View Article

Embedding AI at the Core of Intelligent Telecom Networks Embedding AI at the Core of Intelligent Telecom Networks Embedding AI at the Core of Intelligent Telecom Networks

Charles Bernard

March 1, 2026

Embedding AI at the Core of Intelligent Telecom Networks

In an industry that is evolving faster than ever, Artificial Intelligence is rapidly reshaping how telecom networks are monitored, secured and operated in real time. At Cellusys, we have always believed that leading means more than just keeping pace with innovation. It means implementing intelligent systems in live environments and validating them before broad release…. View Article

Branded Caller ID on Cellusys Platforms Branded Caller ID on Cellusys Platforms Branded Caller ID on Cellusys Platforms

Mark Ennis

February 9, 2026

Branded Caller ID on Cellusys Platforms

“Why did you ignore my call?” is a complaint many businesses now hear routinely. As consumers have grown more cautious about answering unknown numbers, legitimate calls increasingly go unanswered. At the same time, call scams continue to rise globally, costing businesses and consumers billions each year. Cellusys is actively helping operators address this erosion of… View Article

Cellusys Named Platinum Winner for Best Roaming Analytics & Fraud Platform Cellusys Named Platinum Winner for Best Roaming Analytics & Fraud Platform Cellusys Named Platinum Winner for Best Roaming Analytics & Fraud Platform

Mark Ennis

January 28, 2026

Cellusys Named Platinum Winner for Best Roaming Analytics & Fraud Platform

Dublin, Ireland – 28/01/2026 – Cellusys has been named Platinum Winner for Best Roaming Analytics & Fraud Platform at the Telco Future Digital Awards, run by Juniper Research. The Platinum award recognises vendors delivering exceptional impact in live mobile networks and reflects Cellusys’ role in helping mobile network operators address the growing scale, complexity and… View Article

U Mobile blocks 265 million scam attempts with Cellusys network-level scam protection U Mobile blocks 265 million scam attempts with Cellusys network-level scam protection U Mobile blocks 265 million scam attempts with Cellusys network-level scam protection

Mark Ennis

December 29, 2025

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 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… View Article

Cellusys: Generative AI Is Redefining Telecom Security, but Without Signalling Intelligence, Governance and Real-Time Visibility, It Increases Risk Cellusys: Generative AI Is Redefining Telecom Security, but Without Signalling Intelligence, Governance and Real-Time Visibility, It Increases Risk Cellusys: Generative AI Is Redefining Telecom Security, but Without Signalling Intelligence, Governance and Real-Time Visibility, It Increases Risk

Mark Ennis

December 17, 2025

Cellusys: Generative AI Is Redefining Telecom Security, but Without Signalling Intelligence, Governance and Real-Time Visibility, It Increases Risk

Dublin, Ireland – 17 December 2025 – Cellusys, a global specialist in telecom signalling security, has contributed to a major new white paper published by the Global Cybersecurity Forum (GCF) in collaboration with The Saudi Telecom Company (stc), exploring how Generative AI can enhance the protection of next generation telecom networks. The white paper, Enhancing the… View Article

Cellusys Recognised as Champion for Signalling Security and Roaming Analytics in Kaleido Intelligence 2025 Vendor Hub Cellusys Recognised as Champion for Signalling Security and Roaming Analytics in Kaleido Intelligence 2025 Vendor Hub Cellusys Recognised as Champion for Signalling Security and Roaming Analytics in Kaleido Intelligence 2025 Vendor Hub

Mark Ennis

November 25, 2025

Cellusys Recognised as Champion for Signalling Security and Roaming Analytics in Kaleido Intelligence 2025 Vendor Hub

Dublin, Ireland – 26 November 2025 – Cellusys has been recognised as a Champion Vendor in both Signalling Security and Roaming Analytics & Quality Management in Kaleido Intelligence’s Roaming Vendor Hub 2025, following a comprehensive evaluation of 80 vendors and over 185 product offerings across the global roaming ecosystem (full report and release available at… View Article

Cellusys Ranked #1 Vendor for Steering of Roaming for the Third Consecutive Year in Kaleido Intelligence 2025 Assessment Cellusys Ranked #1 Vendor for Steering of Roaming for the Third Consecutive Year in Kaleido Intelligence 2025 Assessment Cellusys Ranked #1 Vendor for Steering of Roaming for the Third Consecutive Year in Kaleido Intelligence 2025 Assessment

Mark Ennis

November 19, 2025

Cellusys Ranked #1 Vendor for Steering of Roaming for the Third Consecutive Year in Kaleido Intelligence 2025 Assessment

Dublin, Ireland – 19 November 2025 – Cellusys has been ranked the #1 vendor for Steering of Roaming (SoR) for the third consecutive year in Kaleido Intelligence’s Roaming Vendor Hub 2025 (full report and release available at Kaleido Intelligence). Kaleido’s Roaming Vendor Hub is the most detailed competitive intelligence assessment in the roaming ecosystem, covering 80… View Article

Cellusys & Simba Announce Steering of Roaming Partnership Cellusys & Simba Announce Steering of Roaming Partnership Cellusys & Simba Announce Steering of Roaming Partnership

Mark Ennis

November 17, 2025

Cellusys & Simba Announce Steering of Roaming Partnership

Cellusys Steering of Roaming (SoR) service, empowers Simba to automatically respond to network dynamics and gain visibility and control over roaming profitability and quality, enabling an unparalleled roaming customer experience for their customers. Singapore & Dublin, Ireland – November 17th 2025 Today, Cellusys and Simba are delighted to announce their partnership, enabling Simba to avail… View Article

Drei Austria and Cellusys Deliver World’s First Steering of Roaming for 5G Standalone Drei Austria and Cellusys Deliver World’s First Steering of Roaming for 5G Standalone Drei Austria and Cellusys Deliver World’s First Steering of Roaming for 5G Standalone

Mark Ennis

November 13, 2025

Drei Austria and Cellusys Deliver World’s First Steering of Roaming for 5G Standalone

Drei Austria, a leading mobile operator, and Cellusys, the #1 provider of roaming and mobile security solutions, have achieved a world first: successfully demonstrating Steering of Roaming for 5G Standalone (SA) networks. This milestone proves that both companies are at the forefront of roaming innovation, going beyond current standards and vendor readiness to make 5G… View Article

Arelion and Cellusys partner to deliver suite of hosted roaming services Arelion and Cellusys partner to deliver suite of hosted roaming services Arelion and Cellusys partner to deliver suite of hosted roaming services

Mark Ennis

October 14, 2025

Arelion and Cellusys partner to deliver suite of hosted roaming services

Stockholm, October 14, 2025 — Arelion today announced a partnership with Cellusys, the industry leader in roaming steering, fraud and security and analytics solutions for mobile operators, to bring a comprehensive suite of hosted roaming Value Added Services (VAS) to operators worldwide. Delivered via Arelion’s global IPX and backbone, the joint solution gives operators a… View Article

Travel eSIMs: the blind spot in MNOs’ roaming strategies Travel eSIMs: the blind spot in MNOs’ roaming strategies Travel eSIMs: the blind spot in MNOs’ roaming strategies

Charles Bernard

August 15, 2025

Travel eSIMs: the blind spot in MNOs’ roaming strategies

What are travel eSIMs? A travel eSIM allows international travellers to buy data connectivity from alternative roaming providers instead of their home operators, without the need for physical SIM cards. Unlike traditional local SIM cards, travel eSIMs use the consumer eSIM standard. The eSIM is embedded directly into compatible devices and can be remotely loaded… View Article

Don’t Fear the Cloud: Virtualising the STP Without Regret Don’t Fear the Cloud: Virtualising the STP Without Regret Don’t Fear the Cloud: Virtualising the STP Without Regret

George Hyland

July 30, 2025

Don’t Fear the Cloud: Virtualising the STP Without Regret

About 25 years ago in Telecom an exciting and yet intimidating new suite of protocols was gaining momentum called SIGTRAN. Operators could get away from cumbersome TDM, AnnexA, ATM and virtualise the SS7 transmission over an IP protocol called SCTP. The potential benefits were huge but the unknown elements such as building out robust IP… View Article

Travel eSIMs Are Eroding Roaming Revenues: How MNOs Can Respond Travel eSIMs Are Eroding Roaming Revenues: How MNOs Can Respond Travel eSIMs Are Eroding Roaming Revenues: How MNOs Can Respond

Chris Lennartz

April 30, 2025

Travel eSIMs Are Eroding Roaming Revenues: How MNOs Can Respond

Travel eSIMs are rapidly capturing roaming traffic — and revenue — from MNOs. Without fast action, operators risk losing control of both outbound and inbound roamers. Here’s how to protect your business and turn the tide. Outbound: Keep Your Subscribers Roaming on Your Network The Problem:Subscribers are switching to TravelSIMs when they travel, fearing high… View Article

Cellusys Acquires Ribbon’s DSC Product Cellusys Acquires Ribbon’s DSC Product Cellusys Acquires Ribbon’s DSC Product

Eva Zlochova

April 30, 2025

Cellusys Acquires Ribbon’s DSC Product

Cellusys to Support Ribbon DSC, STP, DRA, and SP2000 Products We are pleased to share an important update for mobile operators and signalling engineers who rely on Ribbon Communications’ signalling products. As of April 2025, Cellusys is the official provider of engineering, professional services, and Tier 3 support for Ribbon’s Diameter Signalling Controller (DSC), Signalling… View Article

Roaming Quality Matters More Than Ever — Here’s How to Manage It Roaming Quality Matters More Than Ever — Here’s How to Manage It Roaming Quality Matters More Than Ever — Here’s How to Manage It

Daniel McTague

April 23, 2025

Roaming Quality Matters More Than Ever — Here’s How to Manage It

We’ve spoken before about how automation can improve roaming quality. But there’s another important angle that deserves a closer look: how operators can actively steer subscribers based on quality, not just price. Roaming quality has never mattered more — and for some customer segments, it’s now business-critical.Enterprise customers, IoT users, and VIP roamers are increasingly… View Article

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