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What is eUICC and how does it work?

eUICC is often mistakenly associated with eSIMs.

eUICC (Embedded Universal Integrated Circuit Card) is the software component of a MIS. As such, it is not a physical object.

eUICC is a functionality that allows you to store multiple Mobile Network Operator (MNO) profiles and to remotely switch between them using Over-The-Air (OTA) technology.

In other words, thanks to the eUICC functionality, you can have multiple numbers with only one SIM and can easily switch between them by changing the settings.

A SIM card with UICC functionality can only install and use number.

However, whilst the eUICC is designed to support multiple MNO profiles on the same device, they can only be used one at a time.

You should also bear in mind that not all eSIMs have eUICC and some classic SIM cards may now have this functionality.

Other questions

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When should I set up my eSIM?

You can wait until you arrive in the country to activate your eSIM, but please remember that you will need a Wi-Fi connection to perform the installation process

Learn more here
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What happens if I use up my data or exhaust the days of validity?

If you find you need more data than what your eSIM offers, the best option is to top up your eSIM card with the right amount of data for you.

Learn more here
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Can I use my SIM card and Holafly eSIM at the same time?

Yes. Please remember that if you leave your SIM card activated, your network provider may apply data roaming charges to make or receive phone calls, and to send or receive text messages.

Learn more here

Any more questions?

If you encounter any issues during this process, feel free to reach out to us 24/7 through our Live Support chat.

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