VoNR Service Providers

MNOs vs MVNOs for VoNR

VoNR requires 5G SA infrastructure and IMS integration. This limits VoNR delivery to the four UK Mobile Network Operators (MNOs) – EE, Vodafone, O2, and Three – who own the physical 5G SA networks. MVNOs (Mobile Virtual Network Operators) that resell network capacity do not control the underlying 5G SA deployment and typically do not offer VoNR SIMs.

UK MNOs and VoNR readiness

Operator	Network	5G SA	VoNR consumer	VoNR enterprise
EE	BT Group infrastructure	Deploying	Limited	Available in some areas
Vodafone	Vodafone UK	Deploying	Limited	Available in some areas
O2	Virgin Media O2	Deploying	Limited	Available in some areas
Three UK	Hutchison 3G UK	Core deployed	Enabled where SA available	Available in some areas

What specifiers and enterprise buyers need to know

Confirm 5G SA coverage exists at the deployment site – not just 5G NSA
Confirm the operator has VoNR enabled on its 5G SA network in that area
Source SIMs provisioned for IMS – same ISIM requirement as VoLTE (see VoNR SIM Cards)
Confirm the device module supports VoNR (not just 5G NSA data)
For network sliced voice: engage directly with the operator’s enterprise team

The MVNO path

Some MVNOs are beginning to explore VoNR as 5G SA coverage expands. Whether a given MVNO’s SIM activates VoNR depends entirely on the host network agreement and whether the MVNO provisions 5G SA voice services. For current MVNO VoNR availability, you will need to confirm directly with the MVNO. As a default assumption, if the MVNO does not explicitly state VoNR support, assume VoLTE is the voice mechanism.

VoLTE SIM sourcing

Need a SIM provisioned for IMS voice?

The SIM provisioning requirements for VoNR are identical to VoLTE – ISIM on the UICC, IMS credentials provisioned by the operator. The VoLTE SIM enquiry service at voltesim.co.uk can help source the right product.

VoLTE SIM enquiry at voltesim.co.uk