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 of the #1 Steering of Roaming Solution in the market. This partnership will allow Simba to deliver the best roaming experience for its valued subscribers and pave the way for the establishment of 5G Standalone (SA) roaming.
“Directing mobile subscribers to their home network’s preferred networks using both signalling and Over The Air (OTA) solutions has proven to be the best way to optimise both the roaming experience for subscribers and the profitability for the home network, and this can be even more effective with 5G SA around the corner ” said Dan McTague, Chief Technology Officer at Cellusys
With a focus on giving our subscribers the best valued mobile plans, SIMBA roaming is a cornerstone of Simba’s strategy. While numerous challenges for operator roaming (eSIM and OTT apps), from a subscriber point of view, nothing works as well as roaming with their home service, because it allows the seamless use of the mobile service as if they are in their home network. For business travellers and IoT use cases, roaming quality will become more important. Steering of Roaming plays a pivotal role in ensuring that quality.
Furthermore, the upcoming ramp-up in 5G SA services globally will require an efficient and authoritative SoR service which can manage the new signalling protocol (http2). The Cellusys Roaming Platform, laureated as the #1 SoR solution, has this capability built-in and Simba will benefit from this as they grow their subscriber base.
About Cellusys
Founded in 2005, Cellusys is the industry leader in roaming, fraud & security and analytics solutions for communication service providers. The company offers a wide range of products and services designed to give mobile operators visibility and control of their signalling and data traffic. Cellusys has won numerous innovation awards and is ranked as #1 vendor in roaming and security, by both ROCCO and Kaleido, excelling on Net Promoter Score. To learn more, visit www.cellusys.com.
About SIMBA Telecom
SIMBA Telecom is Singapore’s 4th fully licensed mobile network operator with full 4G and 5G spectrum rights. Serving over 1 million subscribers, its efficient approach provides it with the unique ability to offer the best-value-for-money mobile plans with generous inclusions such as free data roaming and unlimited local mobile-to-mobile calls. Furthermore, the in-house engineering expertise have ensured continued innovation and network coverage that meets and exceeds the Infocomm Media Development Authority (IMDA) obligations.
Tags: 5G, cellusys, partnership, Press Release, roaming, Roaming Innovation, Simba, Singapore Telecom, steering of roaming