How UK networks work
Four companies own the masts and everybody else rents from them — the one fact that explains most of the confusion in this market.
Sections on this page
The facts
- EE
- Formed 2010; owned by BT Group
- O2
- Renamed 2002; Virgin Media O2 since 2021
- Three
- Opened 2003; VodafoneThree since 2025
- Vodafone
- Long-established; the other half of that merger
What it means for you
| Owner | Where it came from |
|---|---|
| EE | Built in 2010 by merging Orange and T-Mobile; launched Britain’s first 4G in 2012; owned by BT Group |
| O2 | Began as BT Cellnet; renamed in 2002; half of Virgin Media O2 since 2021 |
| Three | Opened in 2003 as the data-first newcomer; half of VodafoneThree since June 2025 |
| Vodafone | Among the oldest in the market; the other half of that 2025 merger |
The facts
- The model
- Wholesale capacity resold under another name
- Signal
- The landlord’s
- Price and support
- The brand’s
- Complaints
- Always to the brand billing you
What it means for you
Companies without masts buy capacity wholesale and resell identical radio waves under their own name. That is the entire arrangement, and understanding it removes most of the confusion in this market.
| Owner | Brands renting its signal |
|---|---|
| EE | 1pMobile |
| O2 | Tesco Mobile, giffgaff, Sky Mobile |
| Three | SMARTY, iD Mobile |
| Vodafone | VOXI, Lebara |
Coverage questions belong to whoever owns the masts. Complaints belong to whoever sends the bill. Getting those two the wrong way round wastes an enormous amount of people’s time.
The facts
- 3G
- Switched off 2024–25
- Voice now runs on
- 4G Calling
- 5G
- Widely deployed
- Standalone 5G
- Its own core; smallest layer; needs a recent phone
What it means for you
- 3G has gone — two networks switched it off during 2024, one during 2025.
- Voice calls now travel over 4G, so 4G Calling must be enabled on every handset.
- Where a phone cannot support that, it has reached the end of its life on any UK network.
- 5G is widely deployed but mostly leans on 4G underneath.
- Standalone 5G runs on its own modern core — faster where live, still the smallest layer.
The facts
- What happened
- Three and Vodafone combined
- Result
- The largest operator by customers
- Effect on you
- Coverage at a postcode is moving
- Recommended
- An annual re-check
What it means for you
June 2025 combined two of the four owners into the biggest operator in Britain by customer numbers, with substantial money committed to merging the two mast estates.
For customers the practical consequence is that coverage at any given address is less settled than usual. An address that failed a year ago may pass now — which makes an annual re-check genuinely worth doing.
Still unsure after reading this?
Ring the desk and we will go through it with you. There is nothing to buy at any stage.