The mobile coverage problem in London
London's mobile landscape is the most complex in the UK — dense urban 5G, deep underground stations with no signal at all, and pockets where one network is perfect and another is dead within a single street.
That gap — between one network being strong and another being weak in the same street — is what costs you calls and data in London. Most London residents have had the experience: signal great at home, dead at work; full bars in one café, nothing two doors down; perfect on the high street, gone in the supermarket basement. Switching providers doesn't fix it. You just rotate the dead zones.
How Fuse solves it in London
Fuse is one eSIM connected to all four UK networks — EE, Three, Vodafone and O2. In London, that means whichever network has the strongest signal at your exact location handles your data, automatically. When you walk into a building where Three drops, your phone is on EE before you notice. No setting to change, no app to open.
For people on single-network providers — giffgaff (O2), VOXI (Vodafone), SMARTY (Three), Tesco Mobile (O2), BT Mobile (EE), the others — coverage in London depends entirely on whichever carrier they happen to be on. If you've ever switched SIMs because one network was patchy at home, work or your commute, multi-network is the actual fix.
Check your specific London postcode using the coverage checker at the top of this page. It pulls live Ofcom signal data for all four networks at your address — exactly what Fuse would have available.
London at a glance
- Region: Greater London
- Population: 9.0 million
- Postcode areas: E, EC, N, NW, SE, SW, W, WC outcodes
- Country: England
Setting up Fuse in London
You don't need to be in London to set up — Fuse is an eSIM. Order online, scan the activation QR code from your welcome email, and you're connected in 2-3 minutes. Works on any phone that supports eSIM (iPhone XS or newer, Galaxy S20 or newer, Pixel 4 or newer — see the full device list).
If you're moving to London or just started a new job there, you can have a Fuse line live before you arrive — no shop visit, no SIM in the post, no waiting.
Roaming when you travel from London
Fuse Pulse and Surge plans include data roaming in 130+ countries. So whether you're heading abroad from London for work, study or holiday, your phone works the same way as it does at home — same number, same monthly bill, no daily roaming fee. See all roaming destinations.
Compare London mobile providers
Side-by-side comparisons against every other UK provider — most are single-network and tie you to one carrier's London coverage:
- Fuse vs giffgaff — O2 only
- Fuse vs VOXI — Vodafone only
- Fuse vs SMARTY — Three only
- Fuse vs Three — Three only
- Fuse vs Lebara — Vodafone only
- Fuse vs Honest Mobile — multi-network with app restrictions
- Fuse vs Tesco Mobile — O2 only
- Fuse vs BT Mobile — EE only
- Fuse vs iD Mobile — Three only
- Fuse vs Talkmobile — Vodafone only
- Fuse vs Sky Mobile — O2 only