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Fuse Mobile is a multi-network eSIM provider that gives you access to all four major UK networks (EE, Three, Vodafone, and O2) through a single eSIM. Your phone automatically connects to the strongest signal available, so you always get the best coverage.

Unlike traditional providers that lock you to one network, Fuse uses all four UK networks. This means better coverage, fewer dead spots, and a more reliable connection wherever you are. It's like having four networks for the price of one.

No. Fuse is a data-only eSIM — there is no phone number, no carrier voice calls, no SMS. Keep your existing SIM for calls and texts on your current number, and add Fuse alongside via dual-SIM to handle data.

Fuse connects to all four major UK mobile networks: EE, Three, Vodafone, and O2. Your phone automatically selects the strongest signal available at your location.

No. Unlike some backup SIM providers that restrict data to 500 apps, Fuse provides full, unrestricted data access. Every app, every service, every website — no limitations.

Your phone automatically connects to whichever of the four UK networks (EE, Three, Vodafone, O2) has the strongest signal at your location. The switching happens seamlessly in the background without any action needed from you, and you'll always get the best available coverage.

Fuse is data-only — every plan from Spark to Surge is a pure data plan, with no voice minutes or SMS bundles and no separate phone number. Most people make calls and send messages over the internet (WhatsApp, FaceTime, Messenger and the like), which run on your Fuse data at no extra cost. If you still want a traditional number for regular calls and texts, keep your existing SIM alongside Fuse — nearly every modern phone is dual-SIM, so you use your current number for calls and texts and Fuse for data at the same time.

Network switching happens automatically in the background, typically within a few seconds of signal dropping below a usable threshold. Your phone's eSIM continuously monitors signal strength across all four UK networks and connects to the strongest available one without any action needed from you. In most cases you won't even notice the switch happening.

An eSIM (embedded SIM) is a digital SIM built into your phone. Instead of a physical SIM card, your phone's connectivity is activated digitally. This means no waiting for a SIM card in the post — you can be connected in minutes.

Most modern smartphones support eSIM, including iPhone XS and later, Samsung Galaxy S20 and later, Google Pixel 3 and later, and many more. Check our device compatibility tool on the How It Works page to confirm your device.

Yes! Most eSIM-compatible phones support dual SIM — one physical and one eSIM. You can use your Fuse eSIM for data alongside your existing physical SIM for calls, or use Fuse for everything.

After signing up, we'll send you a QR code. Simply scan it with your phone's camera, follow the on-screen instructions, and you'll be connected in under 5 minutes. No technical knowledge required.

Many modern phones support multiple eSIM profiles. You can have your Fuse eSIM alongside another eSIM or a physical SIM. Check your phone settings to see how many eSIM profiles your device supports.

The main limitations are that not all phones support eSIM technology, and you can't physically swap the SIM between devices like you can with a traditional plastic SIM. However, Fuse makes transferring your eSIM to a new compatible device straightforward through your account dashboard.

Common issues include poor internet connection during setup, scanning the QR code multiple times, or device software being out of date. Ensure you have a stable Wi-Fi connection, only scan the QR code once, and update your phone's software before trying again.

Yes, you can regenerate your eSIM QR code through your Fuse account dashboard at any time. Simply log in to your account and visit the eSIM management section to download a fresh QR code for installation.

Fuse is a monthly subscription. You pay at the start of each billing cycle and can cancel anytime. There are no long-term contracts or hidden fees.

Yes, you can upgrade or downgrade your plan at any time from your account dashboard. Changes take effect at the start of your next billing cycle, and we'll prorate any differences.

We accept all major credit and debit cards (Visa, Mastercard, Amex) through our secure payment partner Adyen. All payments are processed securely with 3D Secure authentication.

No contracts, no commitments. Fuse is a rolling monthly subscription. You can cancel anytime, and your service will continue until the end of your current billing period.

No. The price you see is the price you pay. There are no activation fees, no admin charges, no cancellation fees, and no minimum contract. Fuse believes in transparent, straightforward pricing.

Your plan renews on the same date each month, starting from the day you activated your Fuse subscription. Payment is taken automatically from your saved payment method on that date. You can view your next renewal date in your account dashboard at any time.

Yes! Fuse works in over 130 countries worldwide. Plans with roaming included let you use your data allowance abroad at no extra cost. Check our Roaming page for the full list of supported countries.

If your plan includes roaming, there's no extra charge — you simply use your existing data allowance abroad. Plans without roaming included can add it as an option from their account dashboard.

There's nothing to activate. If your plan includes roaming, simply travel abroad and your eSIM will automatically connect to a local partner network. Make sure data roaming is enabled in your phone's settings.

Fuse supports roaming in over 130 countries across Europe, the Americas, Asia Pacific, the Middle East, and Africa. Visit our Roaming page for the complete list of supported destinations.

You can check your data usage at any time from the Fuse app or your online account dashboard. We also send notifications when you reach 80% and 100% of your allowance.

When you use all your data allowance, your data connection will be paused until your next billing cycle. You can upgrade your plan at any time to get more data immediately.

You can upgrade to a higher plan at any time, which takes effect immediately. We'll prorate the difference so you only pay for the remaining days in your billing cycle.

No. Fuse does not throttle your connection speed. You get the full speed available from whichever network you're connected to. Speeds vary by location and network conditions.

You can check your current network connection in the Fuse app. The app shows which of the four UK networks your phone is currently using, along with signal strength and connection type.

You can manage your account through the Fuse app or by logging in at fusemobile.co.uk. From there you can view usage, change plans, update payment details, and more.

You can cancel anytime from your account dashboard. Your service will continue until the end of your current billing period. There are no cancellation fees or penalties.

Go to your account dashboard and select "Payment Methods" to add, remove, or change your default payment card. All payments are processed securely through Adyen.

Yes. If you get a new phone, you can transfer your Fuse eSIM. Log in to your account, go to eSIM settings, and follow the transfer process. You'll receive a new QR code to scan on your new device.

Yes. eSIM technology uses the same encryption standards as physical SIM cards, with added security benefits. Your eSIM profile is encrypted and tied to your device, making it harder to clone or steal than a physical SIM.

If your phone is lost or stolen, contact us immediately and we can deactivate your eSIM remotely. Because eSIMs are embedded in the device, they cannot be physically removed and used in another phone without your credentials.

We take data protection seriously. Your personal information is encrypted and stored securely in compliance with UK GDPR. We never sell your data to third parties. See our Privacy Policy for full details.

Fuse is a data-only eSIM, so there is no number to port. Install the Fuse eSIM alongside your existing SIM via dual-SIM, then choose Fuse as your data line in Settings. Your current carrier keeps handling calls and SMS on your existing number; if you ever want to drop it, do so on your own time.

No. There is no porting and no switchover. Your existing SIM keeps working exactly as before; Fuse activates within minutes of installing the eSIM and immediately starts carrying data across all four UK networks.

Yes. If your phone supports dual SIM, you can add Fuse as a secondary eSIM alongside your existing SIM card. This lets you try Fuse without cancelling your current plan.

Switching to Fuse is straightforward and you can try our 7-day free trial without leaving your current provider. When you're ready to switch permanently, you'll text PAC to 65075 to keep your number, and there's typically no service interruption.

Most phones from 2018 onwards support eSIM, including iPhone XS and later, Samsung Galaxy S20 and later, and Google Pixel 3 and later. Check our device compatibility list on the How It Works page for the full list.

Yes, Fuse works on eSIM-compatible tablets including iPad Pro (2018 and later), iPad Air (3rd generation and later), and iPad Mini (5th generation and later). A data-only plan is ideal for tablet use.

Yes. If you upgrade to a new phone, log in to your Fuse account and follow the eSIM transfer process. We will generate a new QR code for your new device. Your plan and remaining data allowance stay the same.

Yes, the Samsung Galaxy A54 supports eSIM technology and is fully compatible with Fuse. You can check if your specific phone model supports eSIM in your device settings under 'Connections' or 'SIM card manager'.

Yes, your phone must be network-unlocked to use Fuse. Phones bought directly from manufacturers (such as Apple, Samsung, or Google) are typically unlocked by default. If you bought your phone from a network operator, contact them to request an unlock — this is usually free once any contract period has ended.