The Telecoms Conversation
Everything we publish — from customer events to practical technical material.
The Shift from SMS OTP to Network-Based Authentication
As SMS OTP reaches its limits, operators and application providers are shifting toward faster, more secure authentication built on SIM-based trust models.
WAS#24
Meet us at GSMA WAS#24 at the AVIVA Stadium, Dublin, 19–22 October 2026.
Malaga City Guide
Sun-drenched streets, tapas culture, and the breathtaking Caminito del Rey — our insider guide to Malaga.
Accra City Guide
Hot sun, Afrobeats, grilled tilapia, and a city that greets you warmly. Insider tips on food, markets, and getting around Accra.
Barcelona City Guide
Brunch spots, tapas bars, live music, and veggie restaurants — insider picks from our team.
Berlin City Guide
Cosy bars, great brunch, exceptional coffee, Bavarian dinner, and where to party — insider picks from our team.
Zurich City Guide
Absorb the beauty of the lake, eat well, and ski if you can — insider picks for Zurich.
Paris City Guide
The best city in the world — insider picks on bars, cafés, restaurants, where to stay, and what to see.
London City Guide
London is enormous — it goes on forever. Dawood's picks for where to eat, drink, and explore in one of the world's great cities.
WAS#23
Meet us at GSMA WAS#23 at the InterContinental Citystars, Cairo, 24–26 March 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 c...
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...
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...
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 t...
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 cov...
Roaming Product Guide
Technology overview covering the full Cellusys Roaming portfolio — Steering of Roaming, Roam Insight, SMS Outreach, Call Correction, IMSI Translator and GTP Proxy.
Fraud & Security Product Guide
Technology overview covering the full Cellusys Fraud & Security portfolio — Signalling Firewall, Voice Firewall, SMS Firewall, Penetration Testing and Managed Security Services.
Signalling Core Product Guide
Technology overview covering the full Cellusys Signalling Core portfolio — STP, Diameter Routing Agent, Service Communication Proxy, SEPP, MNP and Interconnect & Hubbing.
Analytics & Monitoring Product Guide
Technology overview covering the full Cellusys Analytics & Monitoring portfolio — QoS Monitoring, SIM Box Detection, Silent Roamer Detection, IoT Inbound, Travel eSIM and SMS Blaster Detection.
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, w...
Embedding AI at the Core of Intelligent Telecom Networks
How Cellusys is embedding AI directly into live telecom network operations — from fraud detection and signalling intelligence to operational automation with ANNA.
Infrastructure Engineer
Keep core infrastructure stable and scalable—compute, storage, networking, and the basics that everything depends on.
Mobile Network Engineers, Malaysia
Work on real telecoms signalling and roaming services. Troubleshoot, optimise, and support operator-grade deployments.
Mobile Network Engineers, Thailand
Help operators run safer, higher-quality roaming and signalling services through deep troubleshooting and practical improvements.
