Glossary · Connectivity
MVNO (mobile virtual network operator)
In one sentence
An MVNO (mobile virtual network operator) sells mobile lines and plans without owning radio infrastructure. It rents capacity from a host network such as EE, Vodafone, O2 or Three and runs its own customers, tariffs and billing.
Also known as : MVNO · MVNOs · mobile virtual network operator · mobile virtual network operators · virtual mobile operator
What is an MVNO?
In the UK, the networks that own spectrum and masts are EE, O2 and VodafoneThree (Vodafone and Three combined in 2025). Ireland has three: Vodafone, Three and Eir. These are MNOs. Alongside them, dozens of brands sell SIM cards without having built a single mast. Those are MVNOs, mobile virtual network operators: giffgaff, Lebara, Lyca Mobile, Sky Mobile in the UK, or Tesco Mobile in Ireland.
An MVNO buys network capacity wholesale and resells it under its own name. For the person holding the phone, the difference is invisible: the SIM attaches to the host network and calls and data use the host’s radio. What changes is who sells the plan, who answers support calls and who sends the bill.
How it works
There are two broad models:
- Light MVNOs handle the brand, sales and customer care. The host runs almost everything technical, including the core network.
- Full MVNOs run their own core network, issue their own SIMs or eSIM profiles and manage their own number ranges. They rent only the radio access. That gives them room to build their own services, negotiate their own roaming agreements and integrate mobile lines with fixed telephony.
The commercial and technical terms of access are set in the wholesale contract between MVNO and host. Numbers issued by an MVNO follow the same Ofcom rules as any other mobile number, including number porting.
Example
A facilities management firm in Leeds has 40 engineers on consumer contracts spread across two networks. Customers call engineers on their personal numbers, and when someone leaves, the customer relationship leaves with them. The firm moves to a business-focused MVNO: numbers are ported, all lines are managed from one portal, and every mobile is tied to the company’s cloud PBX. An engineer calling a client back shows the office number, and calls to the main line can ring whoever is on duty.
MVNOs at Universal Telecom
Universal Telecom business mobile works on this model: business plans managed centrally, with numbers tied into the phone system. For a small company the point is not a “different network” but a single supplier for desk phones, mobiles and numbers, much like a UCaaS service. If you want to compare it with your current contracts, send us your line count through the contact page.
Frequently asked questions
Do MVNOs have worse coverage?
No. An MVNO uses its host's masts, so the coverage map is the host's. Differences, where they exist, are about access to features such as 5G, VoLTE, Wi-Fi calling or eSIM, and sometimes priority when a cell is congested.
Can I keep my number when moving to an MVNO?
Yes. In the UK you text PAC to 65075 from the line to get a Porting Authorisation Code and give it to the new provider; the switch is normally done within one working day.
Are giffgaff and Tesco Mobile MVNOs?
Yes. giffgaff runs on O2's network in the UK, and Tesco Mobile Ireland runs on Three Ireland's network. Both sell under their own brand while the radio access belongs to the host.
Related terms
- eSIM
An eSIM is a SIM chip built into a phone or device. Instead of inserting a plastic card, the carrier downloads a subscription profile to it remotely, usually by scanning a QR code.
- Roaming
Roaming lets you use your mobile line abroad on a partner operator's network. Within the EU and EEA, roam like at home rules apply domestic prices; UK networks have set their own charges since Brexit.
- Number porting
Number porting is moving an existing phone number from one provider to another so the business keeps the same number. The new provider runs the process; the old service ends when the port completes.
- Cloud PBX
A cloud PBX is a business phone system run by a provider in its data centres. Extensions, IVR menus, queues and call routing are managed from a web portal, with no PBX hardware on site.
- UCaaS
UCaaS (unified communications as a service) brings business telephony, video meetings, instant messaging and often file sharing together in one cloud service, billed per user and used from desk phones, computers or mobiles.
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