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What is iSIM and how does it work?

iSIM (integrated SIM) work in the same way as eSIM.

There is no need to insert a physical chip as the SIM is integrated directly into the device.

The eSIM is a smaller version of the traditional SIM card and supports the same functionalities.

The difference is that an eSIM cannot be removed, as it is soldered directly to the smartphone's circuit board.

The iSIM takes it a step further.

They are even smaller and connect to an equally small modem. It is integrated into the phone's processor, known as SoC (system on a chip).

iSIMs have many advantages.

Firstly, because they are less than 1mm2 in size, they can offer mobile networks to smaller electronic devices such as smart watches. This also leaves room to incorporate more powerful batteries.

Additionally, iSIMs are much more secure.

Their position and size mean they are physically inaccessible. What’s more, being integrated in the processor provides iSIMs with an additional layer of authentication to enhance data protection.

Finally, the use of this technology helps reduce the costs associated with manufacturing the slots for traditional SIMs.

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

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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.

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Kan jeg bruke SIM-kortet mitt og Holafly eSIM samtidig?

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.

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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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