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What is iSIM and how does it work?

The iSIM (Integrated SIM) represents the latest evolution in terms of miniaturization and efficiency, which is why its adoption is starting to gain popularity, especially in high-end devices and smartphones.


The iSIM is newer than the eSIM (Embedded SIM). The eSIM has been on the market for several years and has been widely adopted in devices like smartphones, tablets, and wearables. However, the iSIM is a more recent technology that takes the concept of the embedded SIM a step further by integrating it directly into the device’s chipset.


To understand what an iSIM is, you first need to know the difference between a iSIM and an eSIM. The main difference is that while the eSIM is an integrated but separate chip within the device, the iSIM combines the SIM and the processor into a single chip, eliminating the need for a separate physical module.

Troubleshooting Tips

If you're wondering "What is the iSIM?" or looking for the "meaning of iSIM," here's a simple explanation: it’s the most advanced technology in the world of SIM cards, perfect for those who want more compact and efficient devices.

How to Purchase the eSIM through the Holafly Website

To buy an eSIM click on Destination or use the Search icon > Type the destination you want to buy and select it > Scroll down to the bottom > Choose the number of days > Choose the number of eSIMs.

Ensure you selected the right number of days and eSIMs, as this can sometimes be confusing.


Confirm your purchase (ensure the days and number of eSIMs are correct) > Click on Checkout  > Choose the payment method > Enter your email and billing address > Continue to payment > Add your card information > Complete order and that's it.

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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