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Fuse
Activate

From sign-up
to connected in 5 min.

Everything you need to activate your Fuse multi-network eSIM and get connected to all four UK networks — no shop visit, no SIM in the post.

How do I activate an eSIM?

To activate a Fuse eSIM: sign up and choose a plan, then open the QR code we email you. On iPhone, scan it with the Camera app; on Android, add it in eSIM settings. Follow the prompts and you're connected to all four UK networks in about 5 minutes — no shop visit and no SIM in the post.

Six steps to better signal

No shop visits, no SIM card in the post, no technical knowledge required. Follow these steps and you will be connected to all four UK networks in minutes.

01

Check your phone is compatible

Most phones released from 2018 onwards support eSIM, including iPhone XS and newer, Samsung Galaxy S20 and newer, and Google Pixel 3 and newer. Visit our compatibility checker on the How It Works page to confirm your device is supported. You can also check by going to your phone settings and looking for a Mobile Data or Cellular section — if you see an option to add an eSIM or mobile plan, your phone is ready.

02

Choose your plan

Pick the data allowance that works for you. All Fuse plans include access to all four UK networks — EE, Three, Vodafone, and O2 — with no contracts and no hidden fees. Whether you need 5 GB for light browsing or unlimited data for streaming and tethering, every plan comes with the same multi-network coverage and zero app restrictions. You can change your plan at any time.

03

Create your account

Sign up with your email address. It takes less than a minute. You will create a password and provide a few basic details. There are no credit checks, no lengthy forms, and no waiting for approval. Your account is created instantly and gives you access to your dashboard where you can manage your plan, view usage, and access support.

04

Complete payment

Pay securely with any major card. There is no deposit, no upfront activation fee, and no hidden charges. Your first month is billed immediately and your plan renews monthly from that date. You can cancel at any time from your account dashboard with no exit fees. All prices include VAT.

05

Scan your QR code

After payment, we email you a QR code within seconds. Open your phone camera, point it at the QR code, and tap the notification that appears. Your phone will guide you through installing the eSIM profile — just follow the on-screen prompts. The whole process takes under two minutes. If you need help, our step-by-step guide walks you through every screen.

06

You are connected

Your eSIM activates instantly after installation. Your phone will start connecting to the strongest available network — choosing between EE, Three, Vodafone, and O2 based on signal strength at your location. There is no waiting period and no manual configuration required. Open the Fuse app to see your connection status, monitor data usage, and manage your account.

Choose your plan

Running Fuse alongside your current SIM

Fuse is a UK multi-network data-only eSIM — there is no phone number, no carrier voice calls, no SMS. Your existing SIM keeps doing what it already does for calls and texts, and Fuse sits alongside it on the same phone to handle data.

Every modern eSIM-capable phone supports dual-SIM, so the two lines coexist with no swap and no porting involved. Install the Fuse eSIM, then in Settings pick which line carries data (set Fuse) and which carries voice (set your existing carrier). Calls and SMS continue on your current number; Fuse handles streaming, browsing, navigation, video calls and tethering over data.

Apps that send messages over the internet — WhatsApp, FaceTime, iMessage, Telegram, Signal — work normally over the Fuse data line. If you ever want to drop your old carrier, do it on your own time; Fuse has no contract and no impact on the other side.

Quick reference — dual-SIM setup

1

Install the Fuse eSIM from your welcome email

2

Label it "Fuse" so it's easy to identify

3

Set Fuse as your data line; keep your existing SIM for calls/SMS

4

Done — your phone now uses the strongest of four UK networks for data

Most customers are fully connected within five minutes. The QR code arrives by email within seconds of completing payment. Scanning the code and installing the eSIM profile takes under two minutes, and activation is instant. There is no waiting period, no approval process, and no need to restart your phone.
No. Fuse is a data-only eSIM — there is no phone number, no carrier voice calls, and no SMS. You keep your existing number on your existing SIM for calls and texts, and add Fuse alongside via dual-SIM to handle data. WhatsApp, FaceTime, iMessage and similar apps work normally over the Fuse data line.
If your phone does not support eSIM, you will not be able to use Fuse at this time. We are focused on eSIM technology as our digital-first approach, but we are exploring options for broader device support in the future. You can check your device compatibility on our How It Works page or in your phone settings under Mobile Data or Cellular.
Yes. Most modern phones support dual SIM — one physical SIM and one eSIM running simultaneously. You can keep your existing provider in the physical SIM slot for calls and texts, and use Fuse in the eSIM slot for data. This is a popular choice for customers who want to try Fuse before switching fully. You can configure which SIM handles calls, texts, and data independently in your phone settings.
You need three things: an eSIM-compatible phone, a Wi-Fi connection for the initial setup (to download the eSIM profile), and an email address for your account. That is it. No ID verification, no credit check, no waiting. The entire process is completed online in under five minutes.
First, make sure you are scanning the QR code with your phone camera, not a third-party QR code app. Ensure your phone is connected to Wi-Fi, as it needs an internet connection to download the eSIM profile. If the code still does not scan, check that eSIM is enabled in your phone settings. You can also try entering the activation details manually — instructions are included in your activation email. If you are still having trouble, contact our support team at support@fusemobile.co.uk and we will help you get connected.

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