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公開2025.01.15更新2025.01.15

How to set up and use an eSIM for international travel?

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List of eSIM-compatible devices See how to set up the eSIM

What settings are necessary to use eSIM when traveling abroad?

Table of Contents

What is eSIM?

eSIM stands for "embedded SIM" and is a technology that connects to a mobile network without the use of a physical SIM card. eSIM is embedded within the device and allows you to remotely switch between multiple provider profiles.

Using an eSIM is recommended when traveling abroad.

An eSIM is a great way to comfortably use your smartphone when traveling abroad. Unlike traditional SIM cards or rental Wi-Fi, eSIMs are easy to set up before your trip and are available in many countries.

How to Use Your Smartphone While Traveling Abroad

The main ways to use your phone while traveling abroad are free Wi-Fi, rental Wi-Fi, physical SIM cards, and eSIM. Each of these methods has its advantages and disadvantages. For a detailed comparison chart and for those who need more information, see the link "No. 7 What are the 6 ways to use a Japanese smartphone or cell phone abroad?" for more information.

*A table of advantages and disadvantages of each connection method and a link to "No.7 What are the 6 ways to use a Japanese smartphone/mobile phone overseas? and a link to "No.7 What are the 6 ways to use a Japanese smartphone or mobile phone overseas?

The appeal of eSIM is its price, safety, and ease of procedure!

eSIM is economical in terms of price, more secure than public Wi-Fi spots, and easy and hassle-free to set up. According to source 1), eSIM usage is higher than existing free Wi-Fi, rental Wi-Fi, and physical SIM cards. This is due to the many advantages of eSIMs, especially when used when traveling abroad.

*Explains the advantages over "free Wi-Fi," "rental Wi-Fi," and SIM cards, which have high usage rates, citing source 1).

How much does an eSIM for overseas use cost?

The price of an eSIM for overseas use varies depending on the country or region you visit, the data plan you choose, and the period of use. The table below lists trifa's prices in popular countries and regions, but prices fluctuate, so it is important to check the latest information. The date the price was obtained should be noted, and a note that prices may vary.

h2 Flow of using an eSIM overseas and how to set it up

The procedure for using a smartphone overseas with an eSIM is very simple, and most of the procedures can be completed in Japan. Some procedures need to be done locally, but if you can connect to Wi-Fi at airports, etc., there is no problem with local procedures.

1. Select and purchase a plan based on destination, data capacity, and number of days

The first step is to select and purchase the most suitable eSIM plan based on the country you are visiting, the amount of data you need, and the length of your stay.

Install the eSIM

After purchasing an eSIM, the next step is to install the eSIM on your device.

How to install directly from the application

The easiest way to install an eSIM is through a dedicated application. While this method is limited, trifa allows you to install the eSIM directly from the app. You are now ready to comfortably use the Internet overseas.

How to use a QR code

Another easy way to install an eSIM is to use the QR code provided by your provider. when you purchase an eSIM, you will usually receive a QR code via email. Simply scan this QR code with your phone to complete the eSIM setup and start using it.

How to enter the activation code

Some providers also offer a way to activate your eSIM using an activation code. In this case, you complete the eSIM setup by entering the code manually.

3. Switching your phone settings

Once the eSIM installation is complete, the next step is to switch your phone's settings to use the eSIM.

For iPhone

Open "Settings

Select "Cellular

Tap "Add Cellular Plan

Confirm that the eSIM settings are complete and select the data plan you wish to use

For Android

Open "Settings

Select "Network and Internet

Tap "SIM Card" or "Mobile Network

Confirm that the eSIM settings are complete and select the data plan you wish to use.

Notes on using an eSIM when traveling abroad

There are some precautions when using an eSIM for international travel. Detailed information can be found at the link "No.1 eSIM for International Travel: 7 Advantages!

Phone numbers are not available.

With an eSIM, you will usually only be able to use local data communications, and your phone number will not be available. If necessary, consider getting a separate plan for calling or using an Internet-based calling service.

Comments from eSIM Users

Many eSIM users have commented positively on the ease of setup, stability of the connection, and transparency of fees. See the comments under "Why we recommend trifa" to see what real users have to say about their experiences.

For your first overseas eSIM, we recommend "trifa"!

Trifa is an eSIM application from Japan, and is the No. 1 app downloaded in Japan.

Its No. 1 attraction is the "ease of use" and "sense of security" of the app. After installing the app on your phone, all you have to do is follow the Japanese-language instructions. You can easily complete the overseas internet communication settings in as little as 3 minutes.

If you have any questions, Japanese chat support is available 24 hours a day, 7 days a week, so even those who are new to eSIM or unfamiliar with smartphone operation can use the service with peace of mind.

Furthermore, since the fees are "completely prepaid," you will never be charged more than you have paid before using the service. So, you don't have to worry about "I used too much overseas data, will I get a high bill later? You can enjoy your overseas trip comfortably and happily without such worries as "I might use too much data overseas and get a high bill later..."!

Thank you for reading this article to the end. We hope this article has answered some of your questions about eSIM.

Translated with DeepL.com (free version)