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Fuse
For poor-signal

The best SIM for poor signal? One that uses every network.

If your signal drops at home, at work or out in the countryside, the problem is usually the single network you're locked to. Fuse uses all four UK networks and picks the strongest automatically.

Recommended for poor-signal

Pulse — £9.99/month

Most-recommended — UK signal and 130+ country roaming

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Pulse at £9.99/month is the best starting point — 10GB of multi-network data plus roaming in 130+ countries. If you mostly need signal rather than lots of data, Spark (£5.99/5GB) still gives you all four networks. Try it free for 7 days before you pay.

Why Fuse works for poor-signal

  • Four networks instead of one

    Single-network SIMs (giffgaff, SMARTY, VOXI, most MVNOs) tie you to one carrier's coverage. If EE is weak where you live but O2 is strong, you're stuck. Fuse holds all four UK networks (EE, Three, Vodafone, O2) on one eSIM and uses whichever is strongest.

  • Automatic switching — no fiddling

    Your phone moves to the strongest signal on its own, in the background, with the same number and data session. You don't pick a network or change a setting — you just stop dropping out in the places you always used to.

  • Fixes the 'great in town, dead at home' problem

    Coverage gaps between the four networks rarely overlap. Where one has a not-spot, another usually has bars. Multi-network closes those gaps, which is exactly where a single-network SIM leaves you stranded.

  • No contract, try it first

    Start with a free 7-day trial, then rolling monthly with no contract. If multi-network doesn't fix your signal, cancel anytime — no 24-month tie-in.

If your signal is unreliable, the usual culprit isn't your phone — it's the single network your SIM is locked to. Every UK network has gaps, and the gaps don't line up. EE might be strong on your street and weak at your office; O2 the other way round. A normal SIM makes you live with whichever one you picked.

A multi-network eSIM fixes that at the source. Fuse puts all four UK networks — EE, Three, Vodafone and O2 — on one digital SIM and switches to the strongest signal automatically, wherever you are. No choosing, no settings, no swapping cards. Check coverage in your area, see how multi-network works, and try it free for 7 days.

The most reliable option is a multi-network SIM that isn't tied to a single carrier. At any given address one network is usually stronger than the others — but which one varies street to street. A multi-network eSIM like Fuse connects to all four UK networks (EE, Three, Vodafone, O2) and automatically uses the strongest, so you're not betting on the one network that happens to be weak at your address.
It helps wherever at least one of the four networks has coverage — which is far more places than any single network covers on its own. In a genuine not-spot where none of the four reach, no SIM can create signal. But for the common rural case where one or two networks work and the others don't, multi-network puts you on the one that works.
You don't have to guess. Check your postcode on our coverage pages to see the networks in your area — or just use a multi-network SIM and let your phone pick the strongest automatically, everywhere you go, instead of committing to one network's map.
Switching to the strongest network for your home address still leaves you on one network everywhere else — work, the commute, family visits. Multi-network gives you the strongest of all four at every location, not just at home, without changing SIMs.
No, as long as your phone supports eSIM — that's most phones from 2018 onwards (iPhone XS+, Samsung Galaxy S20+, Google Pixel 3+). You can keep your current SIM for calls and texts and add Fuse as a data eSIM alongside it.

Fuse for other audiences

Built for poor-signal

Try Fuse free.
For seven days.

Multi-network eSIM, no contract, set up in five minutes.

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No contract. Cancel anytime.