The Fuse app
Manage your eSIM, track your usage, and stay in control — all from your pocket.
The Fuse app is your command centre for everything mobile. It gives you full visibility over your multi-network eSIM, including real-time data usage, live network status, instant push notifications, and complete account management. Whether you want to check your remaining data, see which of the four UK networks your phone is using, or change your plan, the Fuse app puts it all in one place. No call centres, no confusing menus, no waiting. Open the app and you are in control.
Everything at your fingertips
The Fuse app is built to give you complete visibility and control over your mobile service. Here is what you can do.
Real-time data usage
See exactly how much data you have used and how much you have left. Updated in real time, so you always know where you stand. No guessing, no end-of-month surprises.
Network status
Monitor which network you are connected to and check signal strength in your area. The app shows you the multi-network advantage working in real time across all four UK operators.
eSIM activation
Scan your QR code and activate your eSIM directly from the app. The guided setup walks you through every step, and you are connected to all four UK networks in minutes.
Usage alerts
Get notified when you reach 50%, 80%, and 100% of your data allowance. No surprises. You choose which alerts to receive and how they are delivered.
Plan management
Upgrade, downgrade, or manage your plan without leaving the app. View your billing history, update your payment method, or cancel your subscription. No phone calls, no waiting.
Security
Your account is protected with secure authentication and encrypted connections. Manage your security settings, update your password, and control your privacy. Your data stays private.
Download the app
The Fuse app is available on iOS. Android is coming soon.
Download the Fuse app from the App Store and sign in with your Fuse account. If you do not have an account yet, you can create one during the setup process — just choose a plan, complete sign-up, and the app will guide you through eSIM activation step by step. Once signed in, you will have immediate access to your dashboard, live usage data, network status, and account settings. Everything is designed to be clear and fast, so you can get the information you need and get on with your day.
Requires iOS 15.0 or later. Need help getting started? Visit our Help Centre for step-by-step guides.
Don't have a Fuse account yet?
Get started with a multi-network eSIM plan. Choose your data, set up in minutes, and download the app.
No contract. Cancel anytime.