A comprehensive roaming solution for mobile operators and groups of operators that includes Steering of Roaming, SMS outreach, and Anti-Steering Detection. 

The Cellusys Roaming platform combines an extensive rules engine with advanced reporting and analytics capabilities, allowing you to hit more targets on the basis of traffic, without compromising subscriber quality of service.

Each module can be deployed separately based on the needs of your network, or together as a complete roaming control strategy. 

Groups of mobile operators are able to centrally view and control traffic based on group roaming agreements. 

  • Improve subscriber experience with precision control over outbound roamers
  • Maximise profits from wholesale roaming agreements 
  • Increase roaming revenues by engaging silent inbound roamers and counter fear of bill-shock with targeted SMS campaigns
  • Strike better deals thanks to accurate analytics
  • Use the multi-tenancy feature to configure and control multiple remote platforms across your group

Every Network

Fully integrated across access technologies 2G, 3G, and 4G, all modules are able to support roamers on SS7 and LTE/EPC Diameter  based networks. Rules are developed independently of the underlying protocol thus reducing the complex changes required to support roamers on different technologies.

Cellusys Roaming allows the development and enforcement of policies to meet any operator or subscriber group requirements.

Set broad policies or achieve fine-grained control of services available to roaming subscribers such as voice or data

Uses REST API Integration


Powerful analytics give you real-time visibility of all roaming conditions and activity.

The latest Big Data technologies are used for near-real time analytics in tracking patterns of usage and behaviours of subscribers, which means reliable data sources for segmentation.

Guaranteed optimal Update Location (UL) and the identification of fake update locations ensures subscribers are routed to the optimum network with precision. 

Anti-steering attempts are detected and thwarted, providing your subscribers with seamless service at the highest quality.


The intuitive GUI allows administrators to easily configure white and black lists and customise rules for different segments. 

Equipped with powerful (yet agile) reporting and alerting features, you can be sure to have the most accurate information about your network traffic at your fingertips.

Everyone on your team can be provided proper access levels and customise reports to suit their individual needs (no matter their level of technical expertise) thanks to the intuitive GUI. 
Easily set alerts or publish reports as broad as outbound traffic or drill down to troubleshoot VIP roaming complaints with the touch of a button.

Signalling Providers and Signalling Hubs

Signalling is your business — at least maintain control. We have provided many Tier 1 signalling hubs with the capability to control and secure their signalling.


Compliant with GSMA IR.73

GSMA’s Steering of Roaming Implementation Guidelines, IR.73 defines guidelines which provide cooperative requirements between networks when SoR is employed. It also provides technical requirements for minimal impact on the visited network’s SS7 and Diameter links. Version 1.0 was released June 2005, then Versions 2.0 and 3.0 in 2006, and Version 4.0 in October 2014.

Roaming Modules

Click on each module to learn more

Steering of Roaming

Steering of Roaming is an essential part of a comprehensive roaming strategy. The combination of an extensive rules engine with advanced reporting and analytics capabilities allows you to hit more targets on the basis of traffic, without compromising subscriber quality of service.

SMS Outreach

SMS outreach is a tool to provide inbound and outbound roamers with a variety of information which can engage silent roamers, prevent fear of bill shock, provide a better roaming experience, improve loyalty, and ultimately increase roaming revenues.

Anti-Steering Detection

Anti-Steering of Roaming Detection and Prevention is a key element in a  comprehensive roaming strategy. The increased use of anti-steering methodologies provides a commercial risk for operators attempting to accurately control their roamers.

Roam Insight

Roam Insight combines GTP user plane subscriber data consumption analytics with roaming analytics in realtime, for incredibly accurate QoS, metrics, global data roaming volumes and more to improve negotiations, business intelligence, and subscriber experience.

Proof of Concept

Take us for a spin

See about a demo of Cellusys roaming products on your network