One eSIM. Every UK network. No restrictions.
Fuse is a multi-network eSIM that connects your phone to EE, Three, Vodafone, and O2 through a single digital SIM. Your device automatically picks the strongest signal wherever you are, giving you coverage that no single network can match. No app throttling, no data restrictions, no contracts. Just better signal, everywhere.
Traditional mobile providers lock you to one network. When that network has a weak spot — at your office, on your commute, in your living room — you are stuck. Fuse removes that limitation entirely by fusing all four UK operators into one seamless connection. Your phone does the work. You just enjoy uninterrupted coverage.
Set up in minutes
No waiting for a SIM card in the post. No visiting a shop. With an eSIM, your new mobile service is ready in minutes. Choose a plan, scan a QR code, and your phone does the rest. Most customers are connected in under five minutes from start to finish.
1. Choose your plan
Pick the data allowance that fits your life. All Fuse plans include multi-network coverage across EE, Three, Vodafone, and O2 with no contracts and no hidden fees. Start from just £5.99 per month.
2. Scan your QR code
After signing up, we send you a QR code instantly by email. Open your phone camera, scan the code, and follow the on-screen prompts to install your eSIM profile. The whole process takes under two minutes.
3. Stay connected
Your phone connects to the strongest available network automatically. Walk into a Vodafone dead spot and your device switches to EE or Three without you lifting a finger. That is the multi-network advantage.
Four networks. One eSIM.
Every UK mobile network has different strengths. EE leads on speed. Three excels in cities. Vodafone is dependable in rural areas. O2 is trusted nationwide. The problem is that no single network covers everywhere — each one has blind spots, weak zones, and areas of congestion that leave customers frustrated.
Fuse solves that by connecting your phone to all four simultaneously. Your device picks the strongest signal at your location, switching automatically as conditions change. You never have to think about which network you are on — Fuse handles it. The result is 99.8% UK population coverage, the highest available from any provider.
EE
The UK's largest 4G network and a leader in 5G rollout. EE covers 99% of the UK population with 4G and offers the fastest average download speeds in most independent tests. With Fuse, you get full access to EE's extensive infrastructure — without being locked into an EE contract.
Three
Known for generous data allowances and strong 5G coverage in urban centres. Three's network excels in cities and towns, and their mid-band 5G spectrum delivers reliable high-speed connections. Fuse puts Three's full network at your fingertips alongside every other operator.
Vodafone
Vodafone offers dependable nationwide coverage with particularly strong signal in rural areas where other networks often struggle. Their network infrastructure spans thousands of masts across the UK. Through Fuse, you get seamless access to every one of them.
O2
O2 is one of the UK's most trusted networks with a growing 5G footprint and excellent indoor coverage. Their 4G network covers over 99% of the UK outdoor population. Fuse connects you to O2's entire coverage map alongside every other UK network.
Traditional providers lock you to one of these networks. If your chosen network has a weak spot near your office, your school, or your home, you are stuck with poor signal regardless of how much you pay. Fuse removes that limitation entirely. By combining the coverage maps of all four operators, we deliver connectivity that simply is not possible with a single-network SIM. Check your area on our coverage page to see the difference for yourself.
Full data. No app restrictions.
Some mobile providers advertise large data allowances but bury restrictions in the fine print. They throttle video streaming to 480p. They block tethering unless you pay extra. They limit which apps can use your data — in some cases, restricting you to just 500 pre-approved applications. That means your favourite niche app, your work VPN, or a new service you want to try might not work at all.
Fuse does none of that. When you pay for data, it is yours to use however you choose. Stream Netflix in 4K. Video call on Zoom without compression. Tether your laptop at a coffee shop. Run a VPN for work. Download large files. Game online without throttling. Your data allowance is fully unrestricted — every app, every protocol, every service, with no artificial limits on quality or speed.
When you pay for data, it should be yours to use however you choose. Fuse gives you your full data allowance with zero restrictions on which apps, services, or protocols you can use. That is what full data means — no asterisks, no exceptions, no fine print.
Your phone now vs your phone with Fuse
A side-by-side look at what changes when you add a Fuse eSIM to your device. The difference is not subtle.
Most people have no idea they are locked to a single network until they experience the alternative. Fuse gives your phone access to infrastructure that was always there but previously out of reach. Same phone, same apps, dramatically better connectivity. See our plans page to find the right fit for you.
Works in 130+ countries
Your Fuse eSIM travels with you. Whether you are heading to Paris for the weekend, New York for business, or Tokyo for holiday, your eSIM connects to local partner networks automatically. No need to buy a local SIM, no roaming surprises. Depending on your plan, international data may be included or available as a simple bolt-on.
Automatic connection
Land at your destination and your phone connects to a local partner network automatically. No manual setup, no hunting for a SIM card shop at the airport.
No surprise bills
Roaming is built into your plan, not an afterthought. You will always know exactly what your international data costs before you travel.
Global coverage
From Europe to Asia, the Americas to Australasia, Fuse connects you in over 130 countries. Check our roaming page for the full list of supported destinations.
See for yourself
Do not take our word for it. Here is what Fuse customers experience after switching from a single-network provider.
“I live in rural Devon where EE barely works. Fuse picks up Three or Vodafone instead. First time I have had reliable signal at home.”
James R.
Devon
“I commute through central London and the Tube kills my signal. With Fuse, I am connected the moment I step out at every station.”
Priya K.
London
“Switched from EE because I kept losing signal at work. Fuse just finds whatever network is strongest. Should have done it months ago.”
Tom W.
Manchester
Plans from £5.99/mo
Every Fuse plan includes multi-network coverage across all four UK operators, 5G access where available, and no app restrictions. Choose the data allowance that fits your needs and change or cancel anytime. No contracts, no exit fees, no surprises. Just straightforward monthly pricing with everything included.
Save 20% with annual billing. All prices include VAT.
eSIM questions answered
Everything you need to know about Fuse and multi-network eSIM technology. Can't find your answer? Visit our Help Centre.
Ready to fuse your networks?
Join thousands of customers enjoying multi-network coverage. Set up in under five minutes.
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