Advisory note AN-18

Market history

How the United Kingdom ended up with four owners of masts and a dozen consumer brands, and which parts of that still affect your bill.

Note AN-18 · four sections · reviewed July 2026 · no prices published

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Our position in one line

Four companies own the infrastructure and everyone else rents it — one fact that explains most of the confusion in this market.

§1The four owners

Owner	How it came about
EE	Formed in 2010 from Orange and T-Mobile; launched the first UK 4G in 2012; owned by BT Group
O2	Began as BT's Cellnet; took the O2 name in 2002; half of Virgin Media O2 since 2021
Three	Opened in 2003 as the data-led newcomer; half of VodafoneThree since June 2025
Vodafone	Among the longest established; the other half of the 2025 combination

If any of this is unclear

Telephone the advisory and we will talk it through. There is nothing to buy at any point.

020 3896 5248This line is for guidance and information only. We sell nothing, arrange nothing and act for no provider. If anything on this page is unclear, telephone and we will explain it.

§2The wholesale model

Companies without masts buy capacity wholesale and resell identical radio waves under their own names. The signal is the landlord's; the price, the service depth and the timing of new features are the brand's.

That is why coverage questions belong to the owner of the masts, and complaints belong to whoever issues your bill. Confusing the two costs people a great deal of time.

Owner	Brands buying its capacity
EE	1pMobile
O2	Tesco Mobile · giffgaff · Sky Mobile
Three	SMARTY · iD Mobile
Vodafone	VOXI · Lebara

§3The generations

3G has gone. Three and EE closed it during 2024, O2 during 2025. A handset that has started failing on calls is often reaching for something that no longer exists.
4G carries voice now. Enabling 4G Calling is usually the whole fix for those failures; where a handset cannot support it, that device has reached the end.
5G is widely deployed, initially leaning on 4G infrastructure beneath it.
Standalone 5G runs on its own modern core. EE leads nationally; it is the smallest layer and needs a recent handset.

§4The 2025 consolidation

June 2025 brought Three and Vodafone together as VodafoneThree, the largest operator in the country by customer numbers, with substantial money directed at merging the two mast estates.

For customers the practical effect is that coverage at a given postcode is moving more than in ordinary years — which makes an annual re-check worth more now than it has been for a long time.

Common pitfallThe announcement also produced a persistent fraud claiming that plans must be “migrated”. There is no such process on either brand, and real changes arrive in writing.

Speak to the advisory

Telephone the advisory and we will talk it through. There is nothing to buy at any point.

020 3896 5248This line is for guidance and information only. We sell nothing, arrange nothing and act for no provider. If anything on this page is unclear, telephone and we will explain it.