The Vodafone Three merger, explained
If you’re on Vodafone or Three, your network quietly got a lot bigger. The Vodafone Three merger completed in June 2025, joining the two providers into a single company called Vodafone and Three. Overnight it became the UK’s biggest mobile network, with around 27 million customers, nudging just ahead of EE. It’s the biggest shake up the mobile market has seen in years, and it landed with barely a ripple on most people’s bills.
Here’s the thing nobody sends you a letter about: a merger changes who runs your network, but it doesn’t change the deal you’re sitting on. That’s the Do Nothing Default at work. Your tariff rolls on, the direct debit leaves your account, and the quiet assumption is that you won’t check. This guide walks through what the Vodafone Three merger actually means for your bill, your signal, and the cheap SIM deals that ride on the same masts.
Will my bill go up after the Vodafone Three merger?
Not straight away, and not because of the merger itself. As a condition of approving the deal, the regulator made Vodafone and Three keep certain existing tariffs and data plans in place for at least three years, so there’s a protection window built in. What that window doesn’t cover is the normal annual price rise that most networks apply every April.
Those April rises have been punchy. In 2026 some networks lifted bills by up to around 13%, well ahead of inflation. Vodafone and Three have both switched to fixed pounds and pence increases instead of the old percentage sums, so a typical SIM only plan now sees a set rise of roughly £1.50 to £2.50 a month, depending on your plan and when you joined (checked July 2026).
That change isn’t a favour, it’s the new Ofcom rule: any in contract price rise has to be spelled out in pounds and pence when you sign up, so you can see it coming. It’s clearer than the old CPI plus 3.9% maths, but it still stacks up over a two year contract. The merger doesn’t pause it, which is exactly why it pays to know what you’re on.
What happens to my coverage and signal?
This is where the Vodafone Three merger is meant to earn its keep, and the early signs are good. Vodafone and Three has committed to spend £11 billion over eight years building a combined 5G network reaching 99% of the population, a pledge that’s legally binding and watched by both the CMA and Ofcom.
Independent network analyst Open signal found that in the months after the deal, Three customers saw around a 13% improvement in their coverage experience and Vodafone customers around 7%, with download speeds edging up too. Masts are being shared so both sets of customers can reach more of the network, which is the part of the Vodafone Three merger most people will actually feel in their pocket and their signal bars. It won’t happen everywhere at once, so if your signal is patchy today, it’s worth checking back in a few months rather than writing the network off.
The Vodafone Three merger in numbers
| Detail | What we know (checked July 2026) |
|---|---|
| Deal completed | June 2025, forming VodafoneThree |
| Network size | UK’s biggest, around 27 million customers |
| Investment pledge | £11 billion over eight years, legally binding |
| 5G coverage target | 99% of the UK population |
| Price protection | Certain existing tariffs kept for at least three years |
| Early coverage gain | Three users around 13% better, Vodafone around 7% (Opensignal) |
What the merger means for cheap SIM deals and MVNOs
Plenty of the cheapest deals in Britain run on Vodafone or Three masts without carrying either name. Smarty uses Three, Voxi uses Vodafone, and both now sit under the same parent after the Vodafone Three merger. The good news is the deal came with a rule to protect that corner of the market.
Vodafone and Three has to offer fair, equal wholesale terms to the smaller networks, known as MVNOs, that rent space on its masts. In plain terms, the budget brands that use the same masts for a smaller bill are meant to keep getting a fair deal, so the cheap end of the market shouldn’t dry up. If you’ve never looked past the big four names, that’s worth knowing, and there are cheaper networks that use the same masts for a fraction of the price.
How to check you’re not overpaying
The Vodafone Three merger is a good nudge to do the thing you’ve been putting off. The three year tariff protection buys you time, but time is exactly what the Do Nothing Default feeds on. A few minutes now can stop you paying for data you never touch, or renting a handset you finished paying off months ago.
Start by finding out what you actually use. Ofcom reckons the average person gets through about 10.6 gigabytes of data a month, yet loads of us pay for 100GB or unlimited we’ll never finish. Check your last few bills, then weigh that against a plan sized for real life rather than for a heavy month you had in 2023.
If your handset is paid off, a SIM only deal stops you renting a phone you already own. And if a better price is sitting on another network, you can switch and keep your number in roughly a day, so there’s no drama and no new digits to memorise.
One more thing worth checking is when your current deal actually ends. Once you’re out of contract you’re free to leave with no exit fee, yet plenty of us sit tight on a plan that quietly costs more than a fresh one would. That’s the loyalty penalty in a nutshell, and it’s the easiest money most people leave on the table.
The Vodafone Three merger: 5 things to know
- Vodafone and Three are now one company, Vodafone and Three, the UK’s biggest mobile network.
- Your current tariff doesn’t change on its own, and certain plans are protected for at least three years.
- Coverage and 5G should improve as the two networks combine, backed by an £11 billion pledge.
- The normal April price rise still applies, so your bill can creep up regardless of the merger.
- Budget brands like Smarty and Voxi still ride the same masts, so cheap deals aren’t going away.
Frequently asked questions about the Vodafone Three merger
- Do I need to do anything now the Vodafone Three merger is done?
- No, you don’t have to do a thing, and your service carries on as normal. It’s simply a good moment to check your plan still suits you and your budget.
- Is my Vodafone or Three contract still valid?
- Yes. Your existing contract, price and terms stay in place, and certain tariffs are protected for at least three years under the conditions of the deal.
- Will my phone number change?
- No. Your number stays exactly the same, whether you sit tight or move to another network with a switching code.
- Will the merger make my bill cheaper?
- Not automatically. The deal focuses on network investment rather than lower headline prices, so the saving usually comes from choosing a plan that matches how much data you really use.
- Are Smarty and Voxi affected by the Vodafone Three merger?
- They run on Three and Vodafone masts and now share the same parent, but they carry on as usual. The deal includes safeguards meant to keep budget networks competitive.
