Call2Teams Mobile

Call2Teams Mobile significantly expands your addressable market by adding FMC to your business mobile proposition. It broadens your existing offer into multiple enterprise niches — compliance-critical businesses, frontline workers, mobile-first enterprises, DECT replacement, and flexible project workforces. Selling FMC as an additional service layer adds stickiness, protects margins against cloud-only competitors, and reduces churn by making your network infrastructure genuinely harder to walk away from.

For UCaaS providers without a mobile operator partnership, Call2Teams Mobile removes the barrier to delivering true mobility. Through our eSIM capability, available in 39 countries, you can add mobile to your proposition without IMS integration, without a carrier contract, and without significant upfront investment. 90% of business users are already on mobile — this is where your customers are.

End customers reduce costs with BYOD, improve employee experience, and maintain full control of business numbers — even when staff use personal devices. End users get a genuinely mobile working experience: their work number follows them, calls arrive on the native dialer, personal stays personal, and business stays business. No separate app. No data plan required for calls. No training required.

Standard SIP registration connects to any UCaaS platform or PBX natively — no custom integration, no vendor-specific development. End users get all standard telephony and PBX features on their mobile device.

Integration with the mobile operator uses a standard SIP trunk — avoiding the complex IMS integrations that slow time-to-market. Works with any MNO or MVNO without requiring changes to the mobile network core.

The platform achieves global scalability and international data segregation using public or private cloud infrastructure. Elastic and adaptable to demand growth — scale as your customer base grows.

FMC technology patented in the USA, Americas, APAC, and Europe. 20+ years of delivering FMC across Europe and the Nordics. 2.3 million mobile-enabled users today.

Fixed Mobile Convergence (FMC) is a technology that connects a user's mobile phone to a business phone system — so their mobile device behaves like an extension on the office PBX. The user has a single work number that rings on both their desk phone and their mobile. Calls show the work number, not the personal number. Colleagues see accurate presence and line-state regardless of which device the person is using. Call2Teams Mobile delivers FMC through a SaaS bridge — no IMS integration, no separate app, native dialer only.

No. Call2Teams Mobile connects to the mobile operator using a standard SIP NNI trunk — there is no requirement for core IMS integration. This is one of the key commercial advantages of the platform: it avoids the complexity, cost, and time associated with full IMS deployments, while still delivering native FMC behaviour. The platform registers to user extensions like a standard SIP device, mapping each extension identity onto the user's mobile MSISDN.

Call2Teams Mobile is fully UCaaS and PBX agnostic. It uses the standard SIP registration method, which is natively available on mobile devices, to connect to any UCaaS platform or PBX. No custom integration or vendor-specific development is required. End users receive all standard telephony and PBX features on their mobile — including extension dialling, hold, transfer, hunt groups, and presence.

UCaaS providers without a mobile operator partnership can still deliver FMC to their customers through Call2Teams Mobile's eSIM capability, available in 39 countries. Through our collaboration with Tango Networks, UCaaS providers can activate eSIMs for customers directly from the Call2Teams portal — without a carrier contract, without IMS integration, and without significant upfront investment. This allows UCaaS providers to expand their proposition into mobile without becoming a mobile operator.

Activation is fully self-service. Once the eSIM is provisioned, the end user receives a guided activation flow on their device — no IT involvement, no on-site visit required. They download the eSIM profile, confirm their identity, and the mobile number is registered against their PBX extension. Line-state and presence update automatically. From eSIM delivery to first call typically takes under ten minutes. The entire flow is designed to be completed by the end user without support from the SP or reseller admin.