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.
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.
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.
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.
If your Mozillion eSIM won’t activate, here are some steps to help you fix the issue:
If you’re looking to switch provider, choosing between Mozillion and O2 can depend on what matters most to you — whether that’s flexibility, pricing, international usage, or overall network experience.
If you’re looking to switch provider, choosing between Mozillion and Vodafone will come down to what matters most to you — whether that’s network performance, global connectivity, flexibility, or added extras.
Both Mozillion and Three offer strong everyday connectivity, but they differ in how their services are delivered and the networks they rely on.
