SIM Only Deals | Now More Popular Than Ever
Save money on your mobile phone bill with one of the easiest ways to cut your monthly costs and keep more money in your pocket.
Team
04 Sep 2026
SIM card and eSIM installation
When you receive your SIM card or eSIM you need to install it. Instructions are included when we send you your SIM but here’s some further info if you need it.
Installing your physical SIM card?
Mozillion SIM cards fit all phones. Simply pop out the right size card for your phone - standard, micro or nano. Most new phones now use the nano format - you can see which size SIM card your phone needs by looking at the SIM card tray on your device.
Turn off your phone, pop in the SIM card and turn your phone back on. Your phone will reboot and your SIM card will connect and install. If you purchased a plan with your SIM card it will automatically be enabled and you can start using your phone right away.
Install an eSIM
The process for installing an eSIM is included on the email we send you when you order. You will need to scan the included QR code using your phone’s camera, which will then start the eSIM setup and installation process.
If you want to know if your phone is eSIM compatible, here is a list of all eSIM compatible phones.
Changing devices when using an eSIM
eSIMs cannot be transferred to another device once installed. If you want to use your eSIM on a different device from the one you originally installed it on, you will need to request a replacement eSIM. Simply log in to your Mozillion Dashboard, select Manage Plans, then go to Settings. You can then order a replacement eSIM that can be used on your new device.
Please note that replacement eSIMs cannot be issued over the phone or by email. You will need to log in to your Mozillion Dashboard to request a replacement eSIM.
You’re entitled to 1 free eSIM replacement every 12 months. Physical SIM replacements are available for £3 each and can also be requested through your Dashboard.
eSIM troubleshooting
My eSIM won’t activate
If your Mozillion eSIM won’t activate, here are some steps to help you fix the issue:
- Check device compatibility: Make sure your phone is eSIM compatible. You can find a list of compatible devices here.
- Ensure your device is not SIM-locked: If your device is carrier-locked, contact your carrier to unlock it.
- Avoid scanning the QR code more than 5 times: If you have scanned the QR code multiple times and still face issues, please contact Mozillion Customer Support for assistance.
- Follow the activation process carefully: Use your phone’s camera to scan the QR code sent to you by email to start the eSIM setup and activation.
- If you lost your phone before activation: You can still activate the eSIM on a new compatible device by scanning the QR code within 6 months of purchase.
If I purchase a SIM plan, when will the plan start?
Your Plan starts on the activation date stated in your order confirmation. We normally deliver physical SIMs within 1–2 working days, but delivery estimates are not guaranteed.
