How Fuse works
Fuse is a multi-network eSIM that connects your phone to all four major UK networks — EE, Three, Vodafone, and O2. Your phone automatically picks the strongest signal, giving you better coverage everywhere.
How dual-SIM works
Your phone has two SIM slots — one physical and one digital (eSIM). Fuse uses the eSIM slot, so you can keep your existing physical SIM for calls and texts while using Fuse for data.
Set up in 5 easy steps
1. Check your device
Make sure your phone supports eSIM. Most modern smartphones from 2018 onwards do — use our checker below to find out.
2. Choose your plan
Pick the data plan that suits your needs. All plans include multi-network coverage with no contracts.
3. Scan the QR code
After signing up, we'll send you a QR code. Scan it with your phone's camera to install the eSIM profile.
4. Activate your eSIM
Follow the on-screen prompts to activate. Your phone will connect to the strongest available network automatically.
5. You're connected
That's it. Your phone now switches between all four UK networks for the best possible signal wherever you go.
Check your device
Search for your phone to see if it supports eSIM.
eSIM questions
Ready for better signal?
Join thousands enjoying multi-network coverage. No contracts.
No credit card required. Cancel anytime.