<h2 style="text-align: start" id="h86812176b2">Can I use my au smartphone overseas without modification?</h2>Need to change the contracted planWhen using an au smartphone overseas, you may need to change to a plan suitable for overseas use depending on your contracted plan. This is in order to use services that support data communication and calls overseas.Why do I have to pay a high bill?If you use your phone as-is overseas, you may incur data roaming charges, which can lead to unexpectedly high bills. This is due to additional charges for using foreign networks.Precautions to avoid incurring high chargesLimitations on data communicationIt is recommended that data communication abroad be kept to the minimum necessary and that Wi-Fi be utilized.Calling ChargesCalls abroad are charged separately and can be very expensive, so it is advisable to refrain from using them unless necessary or to use a calling app.Global Flat-rate Data PlanBasic InformationThe &quot;World Data Flat-rate&quot; plan is a service provided by au that allows you to use data communications overseas at a fixed rate.(World Data Flat-rate | au)Normal rates and countries coveredThis plan has rates based on daily data usage, and the countries and regions covered are limited.AdvantagesPredictability of ratesBecause rates are known in advance, it is easy to manage budgets.Wide range of countries coveredAvailable in many countries and regions, convenient for overseas travel and business trips.CautionsData usage limitsSpeed limits may apply if a certain amount of data is exceeded.Ineligible ServicesNot available in some countries and regions, or additional charges may apply.Overseas Double-Teigaku PlanBasic InformationThe &quot;Overseas Double-Teigaku&quot; plan is a plan for overseas use that combines data communication and calling.(Overseas Double-Teigaku | au)Normal rates and countries coveredThis plan is also available in certain countries and regions, and rates vary depending on the plan.AdvantagesCalling and data setFor those who are concerned about calling charges, this plan offers peace of mind.Clarity of ratesSince data and calls are combined, rates are clear.Points to noteTerms of useThere are restrictions on calling time and conditions based on data usage.Selecting a planYou need to choose a plan that fits your usage.Is there a way to avoid using an AU plan? How to use your smartphone when traveling overseasIn addition to au plans, there are multiple ways to use your smartphone overseas.For personal use, an eSIM/SIM card is recommended!An eSIM service that can be used instantly is &quot;trifa&quot;, which is an easy and safe procedure.Rental Wi-Fi is also an option if you want to use it with a companion.If you are traveling in a group or have a large amount of data to use, renting Wi-Fi is convenient.For your first overseas eSIM, we recommend &quot;trifa!Trifa is an eSIM application from Japan, and is the No. 1 app downloaded in Japan.Its No. 1 attraction is the &quot;ease of use&quot; and &quot;sense of security&quot; 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 &quot;completely prepaid,&quot; you will never be charged more than you have paid before using the service. So, you don&apos;t have to worry about &quot;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 &quot;I might use too much data overseas and get a high bill later...&quot;!Thank you for reading this article to the end. We hope this article has answered some of your questions about eSIM.

For those who wish to use an au cell phone when traveling overseas, this section explains how to use an au cell phone overseas, including what you need to prepare in advance in Japan and what you need to set up locally.

How to use an au smartphone overseas and points to note

After studying abroad and working in customer service at an electronics retailer and restaurant, she began writing in 2019.

trifa editorial department

<h2 id="hcc59fe4d8b">If you want to use your smartphone when traveling abroad, eSIM is recommended!</h2>If you want to use your smartphone comfortably when traveling abroad, we recommend eSIM. eSIM is a digital SIM that does not require a physical SIM card, but is built directly into the device, making it easy to process and available in many countries, ensuring hassle-free communication while traveling abroad.<h2 id="h924a3252ee">Why can&apos;t I use my phone abroad?</h2><h3 id="ha3e46b0a9e">Functions that cannot be used overseas and the reasons why</h3>The reason why you cannot use your smartphone abroad is mainly due to differences in communication networks and service plans that do not support international roaming. Devices may not support local communication standards, or carriers&apos; services may have restrictions on use outside the country.<h3 id="h91e7ff6925">Can I use international data roaming if I am in an area covered by international data roaming?</h3>International data roaming allows you to use your phone if you are in an area that is covered by the service. However, this service usually comes with a hefty fee, so it is important to check the details of your plan before using it.<h2 id="hb6d7793d78">Can international data roaming be expensive?</h2>International data roaming can result in very expensive bills. As an example, source (1) reported a case where a small amount of data usage resulted in a bill of several hundred dollars. To avoid this, it is worth considering eSIM or other alternatives.Source 1) If I make a phone call while traveling abroad, how will I and the other party be charged? (SoftBank Support)Reference URL: <a href="https://www.softbank.jp/support/faq/view/11399">https://www.softbank.jp/support/faq/view/11399</a>6 Ways to Use Your Phone AbroadBelow is a table summarizing the main methods of using a smartphone overseas and the advantages and disadvantages of each.eSIMeSIM is a method that does not require a physical SIM card, but uses a digital SIM built into the device.Advantages of using an eSIMEasy to purchase and switch plans onlineFlexibility to use multiple plans on one deviceQuickly secure communication while abroadDisadvantages of using an eSIMSupported devices and plans are still limitedSetup may require some initial learningSettings and considerations when using an eSIMCheck for compatible devicesFollow the instructions from the provider to set up the eSIMCheck the rate plan before useWho should use an eSIM?Travelers visiting many countries in a short period of timePeople who want to use multiple numbers and plans on one deviceSIM CardA SIM card is a physical chip that is inserted into a device.Advantages of using a SIM cardWidely supported devices and plansFamiliar format provides peace of mindDisadvantages of using a SIM cardPossibility of high fees for plan changes and international roamingRisk of loss or damageSettings and precautions when using a SIM cardMake sure your device is compatible with the local carrier&apos;s communication standardsWhen purchasing a SIM card locally, choose a store you can trustCheck plan details and prices in advanceWho is recommended to use a SIM cardPeople who stay in the same country for a long period of timePeople who want to use a specific plan or carrierFree Wi-FiFree Wi-Fi is a free Wi-Fi service provided in public places and facilities.Advantages of Using Free Wi-FiFree of chargeSimple and easy to set upDisadvantages of Using Free Wi-FiThere is a security riskConnection can be unstable and slowSettings and precautions when using free Wi-FiUse security software to minimize risksBe especially careful when entering personal informationResearch available Wi-Fi spots in advanceWho should use free Wi-Fi?People who only need to use the Internet for short periods of timePeople who limit their use to light use, such as checking email or browsing mapsRental Wi-FiRental Wi-Fi is a method of renting and using portable Wi-Fi devices abroad.Advantages of Using Rental Wi-FiProvides stable transmission speedsCan connect multiple devices at the same timeDisadvantages of using rental Wi-FiNeed to carry it with youBattery life is limitedUsage fees can be expensiveSettings and Precautions for Using Rental Wi-FiCheck usage fees and data limitsCheck the battery life and charging methodCheck the rental period and return proceduresWho is recommended to use rental Wi-Fi?People who want to use multiple devices at the same timePeople who want to ensure stable communicationAbout Overseas RoamingOverseas roaming refers to using the telecommunication service of a carrier contracted in your home country overseas. Using this feature, you can make calls and use data communications using your home country&apos;s phone number while abroad.Advantages of using overseas roamingYou can use the number of your home country as it is. You can continue to use your home country&apos;s phone number overseas, so there is no need to notify your contact information to change.Reliable means of communication in case of emergency You can immediately contact your family, friends, and business associates in case of an emergency overseas.Disadvantages of using overseas roamingMay incur high chargesYou may be subject to expensive roaming charges based on data usage and talk time.Service may not be available in some areas Service may not be available outside of the service area.Settings and Precautions when Using Overseas RoamingBefore leaving for overseas, contact your carrier to make sure roaming service is activated.Consider signing up for a package plan or limiting data usage to reduce data roaming charges.People for whom overseas roaming is recommendedPersons staying abroad for a short period of timeBusiness people who need to make emergency callsContract with a local carrierAnother option is to sign a contract directly with a local carrier. This is suitable for longer stays or when a more economical means of communication is required.Advantages of contracting with a local carrierReduced costs For longer stays, local plans are often more economical.Full access to local services You can take advantage of the local carrier&apos;s services and promotions.Disadvantages of contracting with a local carrierNeed to get a new number When you sign a contract with a local carrier, you will get a new phone number and will need to inform them of any changes in your contact information.Contract process can be complicated Language barriers and contract terms and conditions must be understood.Setup and considerations when signing a contract with a local carrierResearch local carrier options in advance to compare reputations and plans.Be prepared to provide the necessary documents, ID, and proof of residency for the contract.Who is recommended to sign a contract with a local carrierPeople who plan to stay abroad for an extended period of timePeople who want to secure local communication at a low cost.ConclusionFor a short stay as an individual, eSIM is recommended because it is easy, inexpensive, safe, and has fast communication speeds.If this is your first time using an eSIM overseas, I recommend &quot;trifa&quot;!Trifa is an eSIM application from Japan, and is the No. 1 eSIM application downloaded in Japan.Its No. 1 attraction is the &quot;ease of use&quot; and &quot;sense of security&quot; 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 &quot;completely prepaid,&quot; you will never be charged more than you have paid before using the service. So, you don&apos;t have to worry about &quot;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 &quot;I might use too much data overseas and get a high bill later...&quot;!Thank you for reading this article to the end. We hope this article has answered some of your questions about eSIM.

Is it true that I will be charged a lot if I use my phone while traveling abroad?" If you are having trouble connecting to the Internet when you arrive overseas, here are six ways to use your smartphone overseas and how to choose the right one. If you want to use your smartphone when traveling abroad, we recommend eSIM, which can be used immediately after applying for secure communication locally.

What are the 6 ways to use a Japanese smartphone/cell phone overseas?

To use my phone/mobile phone abroad, "Are there any settings I need to do if I'm going abroad?" "I want to use my phone while traveling abroad, but what settings do I need to make?" We will answer questions such as these and introduce the best ways to use your phone abroad.

Smartphone settings and precautions you need to take when traveling abroad

Traveling to Korea is a fascinating experience for many, but there are several applications and procedures that you should prepare for before you leave. In this article, we will discuss the necessary procedures, what to bring, and useful applications for your trip to Korea.<h2 id="h07eaa42612">Applications and procedures to be done before traveling to Korea</h2><h3 id="hb0f5684373">K-ETA Application</h3><figure><img src="https://images.microcms-assets.io/assets/e55d83d15a00445eae056bbfe6863abe/76ffb6a0ddca4b788016e9bf0572ea32/2.jpeg" alt="" width="5948" height="3965"></figure>You may need to apply for an electronic travel authorization (K-ETA) before traveling to Korea. This is an advance authorization required before travelers from visa waiver countries can enter Korea. The application can be made online and is valid for two years once approved.Q-CODE registration is no longer required.Previously, Q-CODE registration was required to declare health status upon entry into Korea, but is no longer required. Please check the official Immigration Bureau website for the latest information.<h3 id="h2d5a21806b">Visit Japan Web Registration</h3>Although not required for travelers from Japan to Korea, we recommend that you register at Visit Japan Web before departure to simplify the process when returning to Japan.<h3 id="h73dace8a46">Purchasing an eSIM/SIM Card or Renting Wi-Fi</h3>Purchasing an eSIM or SIM card or renting Wi-Fi is a convenient way to connect to the Internet while abroad. For personal use, an eSIM is recommended, as setting up an eSIM in advance allows you to use the Internet immediately upon arrival. It is especially convenient to download &quot;trifa&quot;.<h2 id="h4a6743e9f8">What you absolutely need for your trip to Korea</h2>Passport and photocopyAirline ticketTravel insurance: It is recommended to have travel insurance in case of emergency.Cash: Cards may not be accepted in some places.Credit cardsSmartphone: essential for using translation and map apps.Transformer (adapter): The shape of electrical outlets and voltage in Korea may differ from those in Japan.<h2 id="h906fdf74ec">Climate in Korea and What to Wear When Traveling</h2><h3 id="hdc9d6f9073">Is it 5°C colder than Japan? Take precautions against the cold!</h3>Since winters are harsh in Korea, it is important to take proper measures to protect yourself from the cold. Especially in winter, the temperature tends to be lower than in Japan, so be prepared to wear warm clothes.What are the prices in Korea? Is it possible to buy underwear locally?Prices in Korea vary depending on the item, but some items are less expensive than in Japan. Underwear can be purchased locally in case of emergency, but it is recommended that you bring enough for your needs as you may not be able to find the size or design you prefer.List of Things to Bring When Traveling in KoreaSlippers: You may need these in your accommodations.Power strip: useful for charging multiple devices at the same timeToothbrush and toothpaste: some accommodations may not provide these items.Eco-Bags: You will need these for shopping.Guidebooks: a good thing to have with you to help you overcome language barriers.Medicine: Headache medicine, stomach medicine, etc. to avoid getting sick on an unfamiliar diet.Hat/sunglasses: Sunglasses are necessary during the summer months to protect yourself from the sun&apos;s rays.Wet wipes: It is a good idea to carry wet wipes with you for hygiene purposes.Casino strategy book: If you want to enjoy casino games, it is a good idea to prepare one.Smartphone apps for traveling in KoreaSubway Korea&quot;: An app that provides subway transfer information.NAVER Maps: An app that provides detailed map information on Korea.Kakao T: An app that makes it easy to hail a cab.Kakao Bus: An app for checking bus service information.Korean Translator: A translation app that eliminates language barriers.trifa&quot;: An eSIM app that makes it easy to manage your traffic.With these preparations and information in mind, you can enjoy your trip to Korea with more peace of mind. Please refer to these points when planning your trip.

If you are going on a trip to Korea, this is a must-see! We have compiled a list of essential items such as necessary advance preparation and what to bring with you. To have an enjoyable trip to Korea, don't panic after departure. Let's leave for your trip with all the necessary preparations.

Are you ready for a trip to Korea? Checklist of things to bring and essentials

<h2 id="h6148cd34aa">What is an eSIM?</h2>An eSIM is a &quot;body-integrated SIM&quot; that is pre-embedded in the body of a smartphone.<figure><img src="https://images.microcms-assets.io/assets/e55d83d15a00445eae056bbfe6863abe/a5e8128201c84075befd95cf6b88ed4b/Screenshot%202024-02-01%20at%2022.57.06.png" alt="" width="1194" height="892"></figure>Until now, the conventional wisdom in the telecommunications industry was that a physical SIM card was necessary for smartphone data communication. However, newly developed &quot;eSIM-compatible smartphones&quot; in recent years have a built-in IC chip that replaces the SIM card function.This means that eSIM-enabled phones can be used to change carriers online and use overseas data communications without having to replace the SIM card. eSIM is a convenient and easy-to-use communication technology that can be called the &quot;new normal for overseas travel.<h2 id="hd16742ba88">eSIM is becoming increasingly popular.</h2><figure><img src="https://images.microcms-assets.io/assets/e55d83d15a00445eae056bbfe6863abe/4d18116be40741468425a010d73aeec7/Screenshot%202024-02-01%20at%2022.38.40.png" alt="" width="1150" height="790"></figure>eSIM, which allows users to change carriers and use overseas data communications online, is rapidly gaining popularity around the world, with many users starting to use it because of its convenience.Apple, the company that manufactures and sells iPhones, is also making efforts to promote eSIM, and as proof, basically all iPhones released after September 2018 are eSIM compatible.Japan&apos;s Ministry of Internal Affairs and Communications is also actively promoting the spread of eSIM by establishing &quot;Guidelines for the Promotion of eSIM Services&quot; in 2021, and the trend of eSIM diffusion is expected to continue to progress.<h2 id="he3db2cfa77">Four Ways to Communicate with a Smartphone Overseas and Their Merits and Demerits</h2>There are four main methods of smartphone communication overseas. This chapter explains the merits and demerits of each.<figure><img src="https://images.microcms-assets.io/assets/e55d83d15a00445eae056bbfe6863abe/205f3c4208774fb6bd03cd127dddf7a5/Screenshot%202024-02-01%20at%2022.37.53.png" alt="" width="2354" height="926"></figure><h3 id="h2ca3209ec1">Overseas Roaming</h3>｜How to use overseas data communications via a telecommunications carrier contracted in Japan.Advantage: No need to sign a WiFi contract or exchange SIM cardsDisadvantages: Often expensive, limited number of countries, days, and data volume depending on the carrier<h3 id="h30a9814d58">Rental WiFi</h3>｜Rental WiFi router is a method to use local data communication by renting a WiFi router before departure.Advantage: Many choices of supported countriesDisadvantages: Need to pick up/return at the airport, troublesome to charge and carry during the trip, risk of breakdown/loss<h3 id="he301c48e92">Local SIM card</h3>｜To purchase a SIM card locally and use it.Advantage: Relatively inexpensive in many casesDisadvantages: Need to purchase in local language, risk of failure/loss when replacing SIM card<h3 id="h55441c11af"> eSIM (Trifa)</h3>｜How to use overseas data communication by using eSIM applicationAdvantages: Complete with one app, support for 195 countries worldwide, 24-hour Japanese chat supportDemerit: Cannot be used with smartphones that do not support eSIMeSIM is superior to conventional communication methods in terms of &quot;easy procedures,&quot; &quot;lightness in carrying around,&quot; and &quot;cost performance. eSIM is an innovative overseas smartphone communication method that users with eSIM compatible smartphones have &quot;no reason not to choose.<h2 id="hec6a0303f1">Seven Advantages of Using an eSIM for International Travel</h2>In this chapter, we will introduce the advantages of eSIM, the new standard for international travel, in a nutshell, along with what we have already mentioned.<figure><img src="https://images.microcms-assets.io/assets/e55d83d15a00445eae056bbfe6863abe/d92c9ffdc39b420d8b2dcab028a327d9/1%20(5)%20(1).jpg" alt="" width="3448" height="2160"></figure><h3 id="h2b6d6d3c88">(1) Low usage fees</h3>eSIM&quot; can be used at a lower cost than Wi-Fi routers. You can also purchase a plan for only the period necessary for your stay and use the line at a lower cost. Another advantage of eSIM is its flexibility; if your overseas travel schedule changes, you can immediately purchase an additional plan from your terminal.<h3 id="h63d6041572">(2) Easy application and activation procedures</h3>eSIM&quot; can be activated from the terminal via the Internet. Many eSIMs can be used on the same day after the activation procedure is completed, so you can prepare your Internet environment in time even just before your overseas trip.<h3 id="h2437883509">(3) Same-day service is available from the local terminal</h3>eSIM&quot; allows you to open an eSIM terminal easily. Setup is possible even from overseas, as long as you are at an airport or other location with a WiFi environment. If you are too busy to pick up your SIM card in Japan, or if you have a sudden overseas trip, eSIM allows you to connect to the Internet anywhere with a single device.<h3 id="h93d090af2b">(4)No need to receive and return telecommunication equipment</h3>eSIM&quot; can be used simply by installing it on a terminal, so there is no need to return it like rental Wi-Fi routers or some SIM cards for overseas use. Also, since an Internet connection can be established with just a terminal, there is no need to carry a router or mobile battery for the router. This allows you to enjoy your overseas travel with less luggage.<h3 id="h3a681a9bf2">(5) No need to replace the SIM</h3>eSIM&quot; is a system that eliminates the need to replace the SIM card. There is no need for a small SIM card or SIM pin, so there is no risk of loss or damage.<h3 id="hb760c271ef">(6) Easy switching across countries</h3>With a conventional SIM card, when you move to a new country or region, you have to go to the trouble of replacing it with a corresponding SIM card. With an eSIM, however, an electronic SIM is programmed into the device, so you can use the Internet as soon as you select a country or region on the device.<h3 id="heedda2af36">(7) Not bound by restrictions on SIM card purchases</h3>In Germany, due to anti-terrorism measures, since January 2017, the Telecommunications Act has made it mandatory to verify identity and register an address when purchasing a &quot;prepaid SIM card&quot;. The advantage of &quot;eSIM&quot; is that you are not affected by such country-specific SIM card purchase regulations.Disadvantages of eSIMAlthough the eSIM has many advantages for international travelers, there are actually two important disadvantages. We will explain them in this section, so if you are considering using an eSIM, please check them out!Local phone numbers do not workMost eSIMs do not provide local phone numbers. Therefore, if you are sure that you need to make calls or send/receive SNS (short messages) using a local phone number, we recommend that you use the overseas calling service of your carrier in Japan or purchase a SIM card with a local phone number.On the other hand, LINE and Instagram call functions can be used without any problems even with an overseas eSIM, so those who say, &quot;I use LINE to make calls, so I don&apos;t have to worry about it,&quot; can use an eSIM with no worries.If your smartphone does not support eSIM, you cannot use it.Although eSIM is rapidly becoming popular both in Japan and overseas, some smartphones are not eSIM compatible, so be sure to check in advance whether your smartphone is eSIM compatible or not.▼ eSIM-enabled iPhone handsets<pre><code>・iPhoneXS, iPhoneXS Max, iPhoneXR
・iPhone11, iPhone11 Pro, iPhone11 Pro Max
・iPhone12 mini, iPhone12, iPhone12 Pro, iPhone12 Pro Max
・iPhone13 mini, iPhone13, iPhone13 Pro, iPhone13 Pro Max
・iPhone14, iPhone14 Pro, iPhone14 Pro Max,  iPhone14 Plus
・iPhone15, iPhone15 Pro, iPhone15 Pro Max,  iPhone15 Plus</code></pre>▼ Android devices with eSIM support <pre><code>・Google Pixel 4/4a/4 XL 以降 
・Xperia 10 III Lite 以降 
・HUAWEI P40 Pro 以降 
・Redmi Note 10T 以降 </code></pre>*Information as of February 1, 2024How to check if a device is eSIM-enabled Enter &quot;*#06#&quot; in the standard phone application, and if the display shows &quot;device number&quot;, &quot;EID number&quot; and &quot;barcode&quot;, the device is eSIM-enabled.<h2 id="h5351a6f3a6">Procedures for using an eSIM when traveling abroad and when to switch</h2>eSIM&quot; can be easily installed simply by operating the terminal at hand.<h3 id="h40cb374bf3">Procedures for using an eSIM</h3>(1) Select an eSIM provider that offers services in the country or region where you will be using the eSIM.(2) Select a plan according to the country and period of stay, and acquire the eSIM data.(3) Activate the eSIM you have obtained to complete the usage procedure!Although it will be smoother if you complete the steps up to activation before your trip, you can also use the service abroad if you have a stable Internet connection.As for the timing of the switchover, if you set up your eSIM as a mobile data communication SIM just before your trip, you will be able to catch the local signal and use the line immediately after your arrival.<h2 id="hb4676fad78">If you are looking for an overseas eSIM for the first time, we recommend &quot;trifa&quot;!</h2>Trifa is an eSIM application from Japan, and is the No. 1 eSIM application downloaded in Japan.Its No. 1 attraction is the &quot;ease of use&quot; and &quot;sense of security&quot; 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 &quot;completely prepaid,&quot; you will never be charged more than you have paid before using the service. So, you don&apos;t have to worry about &quot;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 &quot;I might use too much data overseas and get a high bill later...&quot;!Thank you for reading this article to the end. We hope this article has answered some of your questions about eSIM.

If you want to use your smartphone when traveling abroad, eSIM is the way to go! You can easily apply in advance or on the same day at your destination, and there is no need to pick up and return the device. It is also easy to switch from one phone to another when traveling to several countries at low rates!

eSIM is recommended for international travel! Here are 7 advantages in a nutshell.

<h2 style="text-align: start" id="h361224a8e9">Rental Wi-Fi or SIM CardsWhich is more popular?</h2>Rental Wi-Fi and SIM cards are both popular options for accessing the Internet abroad. Both have advantages and disadvantages, and they are often chosen based on your needs, such as whether you will be traveling alone or with multiple people, what kind of situations you will use the Internet at your destination, and how many days you will be traveling.<a href="https://mmdlabo.jp/investigation/detail_1714.html" target="_blank" rel="noopener noreferrer nofollow">Hotel Wi-Fi and Wi-Fi rentals&quot; are the top Internet use when traveling abroad</a><table><tbody><tr><th colspan="1" rowspan="1">item</th><th colspan="1" rowspan="1">レンタルWi-Fi</th><th colspan="1" rowspan="1">SIMカード</th></tr><tr><td colspan="1" rowspan="1">Price</td><td colspan="1" rowspan="1">高い</td><td colspan="1" rowspan="1">安い</td></tr><tr><td colspan="1" rowspan="1">convenience</td><td colspan="1" rowspan="1">接続設定が簡単、複数台接続可能</td><td colspan="1" rowspan="1">設定がやや面倒、SIMフリー端末が必要</td></tr><tr><td colspan="1" rowspan="1">baggage</td><td colspan="1" rowspan="1">かさばる</td><td colspan="1" rowspan="1">軽くてコンパクト</td></tr><tr><td colspan="1" rowspan="1">Supported models</td><td colspan="1" rowspan="1">ほとんどの機種に対応</td><td colspan="1" rowspan="1">SIMフリー端末またはSIMロック解除端末のみ対応</td></tr><tr><td colspan="1" rowspan="1">velocity</td><td colspan="1" rowspan="1">安定している</td><td colspan="1" rowspan="1">通信状況によって変動する</td></tr><tr><td colspan="1" rowspan="1">security</td><td colspan="1" rowspan="1">比較的安全</td><td colspan="1" rowspan="1">紛失リスクあり</td></tr></tbody></table><h2 style="text-align: start" id="h73d80da071">Advantages of using rental WiFi</h2>A single device can connect multiple communication devices to the Internet at the same time<figure><img src="https://images.microcms-assets.io/assets/e55d83d15a00445eae056bbfe6863abe/dd44690e83b94f25866b4c3aa7710838/airport-3511342_640_480.jpg" alt="" width="480" height="320"></figure>If you are traveling with multiple people or have multiple devices such as smartphones and tablets, you can use one rental Wi-Fi to connect all of your devices to the Internet. For example, if you are working at a café on your trip, you can connect your smartphone, tablet, and PC to the WiFi and work on the Internet. If you are a little worried about using the free WiFi at a café or hotel, you don&apos;t have to worry if you have a rental WiFi.Easy to set upJust enter your Wi-Fi password and you are online instantly, with no complicated setup required. It is convenient for friends, couples, and families traveling together to rent one unit and share the password so that everyone can connect to the Internet.<h3 id="h5c8b366cb9">No need to prepare a SIM-free device</h3>Any smartphone or tablet can connect to the Internet as long as it has a Wi-Fi connection. You can use the same smartphone or tablet you normally use in Japan, so you can take photos and post them on SNS as usual, or send photos to friends from abroad as usual.<h2 id="h471365e250">Disadvantages of using rental WiFi</h2><h3 id="h69901b2e79">High price</h3>Rental fees can be expensive for longer periods of time.<h3 id="haddcf8115d">More luggage</h3>You need to carry the rental Wi-Fi device with you.<h3 id="hf063aa4490">Time-consuming to sign up, pick up, and return the device</h3>You need to pick up and return the device before your trip and after your return.<h3 id="hc794b19d1d">Cannot use the device when it runs out of charge.</h3>If the battery in the rental Wi-Fi device runs out of power, you will not be able to connect to the Internet.<h2 style="text-align: start" id="h82ec7d2246">Advantages of using a SIM card</h2><h3 id="h6bcc64ceff">Low price</h3>Depending on the data plan, it is often more cost-effective than rental Wi-Fi. Traveling abroad is expensive, and you don&apos;t want to spend as much money as possible on communication expenses. Inexpensive SIM cards are popular for both short-term and long-term trips, and are also popular among young people such as students traveling abroad.<h3 id="h3e0f4938a7">No baggage</h3>The SIM card is so small that it does not constitute additional baggage. The lack of bulk is a huge advantage, as there is no need for a cord to charge the battery. It is also ideal for those who prefer to travel with just a small bag. It is also recommended for people who do outdoor activities and sports, as it allows them to move around with their hands free without carrying large luggage.<h3 id="hfb1a04c022">Easy to sign up</h3>It is often easy to sign up at the local airport or online. If you complete it online, there is no rush to move around before and after your trip, so you can leave calmly and relax after your trip and enjoy the aftermath of your trip back home.SIMカードを使うデメリット<h3 id="h1c97b93702">Only SIM-free or SIM-unlocked handsets can be used.</h3>To use a SIM card, a SIM-free or SIM-unlocked handset is required. This may be a significant disadvantage. Also, since you can only use the device with the card, you will not be able to connect your tablet to the Internet to do research because your smartphone is turned off, as you can do with rental WiFi.<h3 id="h20d81d73f8">Preparation and Setup</h3>It may take some time and effort to set up the data connection. If you are not used to operating a smartphone, setting up connections, etc., it may take a little time if you are using it alone.<h3 id="hc8fcb12297">SIM card storage</h3>Due to its small size, there is a risk that it can be easily lost. This is a point to keep in mind. I have heard of many cases where the SIM card fell into the space between the seats when trying to replace it on an airplane and could not be removed. When replacing the SIM card, be sure to do so in a calm environment, and when storing it, be careful not to lose it by putting it in a case or a zippered bag.<h2 style="text-align: start" id="hbf11c8f4b5">Who is recommended to rent WiFi?</h2>1.People who have multiple devicesIf you have multiple devices such as a smartphone for work, a smartphone for private use, a tablet device, a camera with WiFi communication, and a PC, renting one WiFi rental is convenient for you to use the Internet on multiple devices at the same time.2.People who prefer simple operationThe simple operation is a big attraction, as you only need to enter your password to connect, and there are no complicated settings to be completed.3.Short-term usersThe disadvantage of international WiFi rental is the high rental fee, which is a big expense for a long period of time. It is recommended for short-term travelers.<h3 style="text-align: start" id="h3736212f42">People for whom a SIM card is recommended</h3>People who value cost1.Compared to rental WiFi, SIM cards are less expensive. It is also popular among students on graduation trips, etc., as it is easy to use.2.People who use only one deviceSIM cards are recommended for those who use only one device, as only the device with the SIM card can connect to the Internet.3.Long-term usersRental WiFi is expensive if rented for a long period of time, but SIM cards are relatively inexpensive and can be used for long trips.<h3 id="h443901d359">Other Options</h3><h3 id="h7cc84fbdec">How to use your phone when traveling abroad</h3><figure><img src="https://images.microcms-assets.io/assets/e55d83d15a00445eae056bbfe6863abe/a550ab3256564746a12a74eb540e970e/photographer-407068_1280.jpg" alt="" width="1280" height="853"></figure>1.Using eSIMWhile physical SIM cards need to be replaced, eSIMs can be used simply by completing the online procedure and downloading an application, so there is no need to receive or even replace the SIM card.2.Use of Free Wi-Fi\This is a method of utilizing free WiFi available in cities, cafes, hotels, etc. abroad. Some have passwords, but others can be used by anyone without a password. However, for that reason, care should be taken when connecting devices that handle confidential or personal information.3.Signing up for an overseas roaming planIf you sign up for an overseas roaming plan with a cell phone company, you can use your phone as you would in Japan without having to replace the SIM card or rent WiFi.<h3 id="haf5ef8f8e6">If you don&apos;t need to make calls, eSIM is the way to go!</h3>eSIM is a convenient way to use the Internet as soon as you arrive at your destination, as you don&apos;t need to rent a WiFi device, SIM card, or other physical equipment. You don&apos;t need to rent a WiFi device, SIM card, or any other physical equipment.Points to note about eSIMIf your smartphone is not eSIM compatible, you cannot use it.Although eSIM is rapidly becoming popular both in Japan and overseas, some smartphones are not eSIM compatible, so be sure to check in advance whether your smartphone is eSIM compatible or not.▼ eSIM-enabled iPhone handsets<pre><code>・iPhoneXS, iPhoneXS Max, iPhoneXR
・iPhone11, iPhone11 Pro, iPhone11 Pro Max
・iPhone12 mini, iPhone12, iPhone12 Pro, iPhone12 Pro Max
・iPhone13 mini, iPhone13, iPhone13 Pro, iPhone13 Pro Max
・iPhone14, iPhone14 Pro, iPhone14 Pro Max,  iPhone14 Plus
・iPhone15, iPhone15 Pro, iPhone15 Pro Max,  iPhone15 Plus</code></pre><pre><code>・Google Pixel 4/4a/4 XL 以降 
・Xperia 10 III Lite 以降 
・HUAWEI P40 Pro 以降 
・Redmi Note 10T 以降 </code></pre>*Information as of February 1, 2024How to check if a device is eSIM-enabled Enter &quot;*#06#&quot; into a standard phone application, and if you see &quot;device number&quot;, &quot;EID number&quot; and &quot;barcode&quot;, the device is eSIM-enabled.<h3 id="h6d5163adfa">If this is your first time using an overseas eSIM, we recommend &quot;trifa&quot;!</h3>Trifa is an eSIM application from Japan, and is the No. 1 app downloaded in Japan.Its No. 1 attraction is the &quot;ease of use&quot; and &quot;sense of security&quot; 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 &quot;completely prepaid,&quot; you will never be charged more than you have paid before using the service. So, you don&apos;t have to worry about &quot;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 &quot;I might use too much data overseas and get a high bill later...&quot;!Thank you for reading this article to the end. We hope this article has answered some of your questions about eSIM.

Many people choose rental Wi-Fi and SIM cards as their method of using the Internet when traveling abroad. We will review the advantages and disadvantages of each, and also introduce other methods.

Which do you recommend for international travel, Wi-Fi rental or SIM card?

<h2 id="h163248d089">What is tethering?</h2>Tethering is the ability for one device to be connected to a cellular network and share its Internet connection with other devices. A smartphone or tablet acts as a mobile Wi-Fi hotspot, providing Internet access to surrounding devices. There are three main ways to connect: Wi-Fi, Bluetooth, and USB.<h3 id="h8b40bf460d">Wi-Fi Connection</h3>Wi-Fi tethering is the most common and easiest to set up. The device emits a Wi-Fi signal and other devices can connect to its Wi-Fi to access the Internet.<h3 id="h8ed5bf2a3a">Bluetooth Connection</h3>Tethering over Bluetooth is also possible, but tends to be slower than Wi-Fi. However, it consumes less power than Wi-Fi, making it a good choice if you want to conserve battery power.<h3 id="hd382d73f50">USB Connection</h3>USB tethering is a direct connection of devices with a USB cable. The connection is more stable and the battery is less of a concern since the device is charged, but a cable is required and only one device can be connected.<h3 id="h5b6d2499ea">Reasons for slow communication when tethering</h3>The main reasons for slower communication speeds when tethering include signal strength, network congestion, and the processing power of the tethered device. Also, if many devices are connected at the same time, bandwidth may be split, slowing down the speed of individual devices.<h2 id="h4f6788b10a">What is eSIM?</h2>Embedded SIM (eSIM) is a technology that replaces the traditional physical SIM card and is built into the device. eSIM allows users to remotely activate their cell phone plans and switch between multiple carriers.<h3 id="hd16742ba88">eSIM is becoming increasingly popular.</h3>According to forecasts by the Ministry of Internal Affairs and Communications, approximately 33.8% of all smartphone shipments are expected to be eSIM-enabled devices by 2024. This figure indicates that eSIM technology is rapidly penetrating the market as a mainstream alternative to conventional physical SIM cards, and its adoption is accelerating among consumers and operators as the convenience of eSIM is recognized (see &quot;Draft Direction of Study | Ministry of Internal Affairs and Communications&quot;).The Ministry of Internal Affairs and Communications forecasts that 33.8% of smartphone shipments will be eSIM-compatible handsets by 2024&quot; (Direction of Study (Draft) | Ministry of Internal Affairs and Communications) Reference URL: <a href="https://www.soumu.go.jp/main_content/000735823.pdf">https://www.soumu.go.jp/main_content/000735823.pdf</a><h3 id="h8fce2f899b">Can tethering be used with an eSIM?</h3>Devices equipped with an eSIM can be tethered in the same way as devices using a conventional SIM card. eSIM itself does not function as a method of providing Internet connectivity, but shares the connection with other devices through the device&apos;s tethering function.<h2 id="ha233f9a020">How to set up an eSIM to use the tethering feature</h2>Even devices with an eSIM require some configuration to use tethering. Below we explain how to set up tethering on Android and iPhone.<h3 id="hc4a740fe66">How to use tethering on Android</h3><ol><li>Open the &quot;Settings&quot; application.</li><li>Tap &quot;Network and Internet.</li><li>Select &quot;Hotspot and Tethering.</li><li>Tap &quot;Wi-Fi Hotspot&quot; and configure the necessary settings. If necessary, also set security settings and passwords.</li></ol><h3 id="hcbd72acb12">How to tether with iPhone</h3><ol><li>Open the Settings app.</li><li>Tap &quot;Personal Hotspot.</li><li>Turn on &quot;Allow personal hotspots&quot; and set your Wi-Fi password.</li><li>Search for a Wi-Fi network on the other device you wish to connect to and connect using the password you set.</li></ol><h2 id="h20ff6512fd">Tethering when traveling abroad is not recommended for some applications.</h2>While tethering while traveling abroad can be very convenient, there are some caveats. In particular, if you are considering using a PC or using your smartphone with more than one person, you need to think carefully.<h3 id="hca250dcbbe">If you want to use your PC while abroad</h3>When using a PC abroad, you need to be aware of its convenience as well as its rapid consumption of communication capacity. Especially when connecting to the Internet through tethering, it is important to pay attention to the following points<h4 id="hbb956ab533">Digesting communication capacity quickly</h4>PCs are frequently used for data-intensive activities such as high-resolution video viewing, large file downloads, online meetings, and software updates. These activities require special attention when tethering abroad. Some communication plans have a cap on the amount of data that can be used, and exceeding this cap may result in additional charges or a significant drop in speed. Therefore, be aware of the following points when using a PC overseas.<h3 id="hb9510006f2">When two or more people want to use a smartphone when traveling abroad</h3>When more than one person uses a smartphone overseas, tethering is a convenient means of communication, but it can lead to slower communication speeds and a spike in data usage. Therefore, it is recommended that you use your own data plan whenever possible, or consider the following services<h2 id="hdfe250d3c5">Disadvantages of tethering when traveling abroad</h2>There are a few things to keep in mind when using tethering abroad.<h3 id="hd738098cb2">The battery of the device providing the tethering is easily depleted.</h3>Tethering consumes a significant amount of the device&apos;s battery. In particular, if multiple devices are connected, the battery will deplete even faster.<h3 id="h977f0f2101">Connection is lost after a certain amount of time without communication, so the device must be connected from Wi-Fi many times</h3>When using tethering, the connection may automatically disconnect if there is no communication for a certain period of time. This feature is intended to extend battery life and prevent unnecessary data usage, but frequent disconnections during use can be inconvenient.<h3 id="ha91be9887c">Data backup, synchronization, and updates can consume communication space.</h3>Processes that take place in the background, such as automatic backups, app synchronization, and system updates, can use large amounts of data without being noticed. Especially abroad, this can result in unexpectedly high data charges.<h2 id="h741dcb34cc">If you&apos;re traveling abroad with a group, you should each sign up for your own eSIM or rental Wi-Fi.</h2>When traveling abroad in a group, it is recommended that each person use their own eSIM service or rental Wi-Fi instead of tethering. This will make data usage more manageable, improve connection stability, and prevent battery life issues and slower transmission speeds. Having each person have an independent connection improves the communication experience for the entire group.<h2 id="haca8a838d9">For your first overseas eSIM, we recommend &quot;trifa&quot;!</h2>Trifa is an eSIM application from Japan with the No. 1 app DL number in Japan.Its No. 1 attraction is the &quot;ease of use&quot; and &quot;sense of security&quot; 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 &quot;completely prepaid,&quot; you will never be charged more than you have paid before using the service. So, you don&apos;t have to worry about &quot;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 &quot;I might use too much data overseas and get a high bill later...&quot;!Thank you for reading this article to the end. We hope this article has answered some of your questions about eSIM.

The tethering function can be used with an eSIM. However, when traveling abroad with more than one person, it is better to have an eSIM contract for each person. This section explains some of the unexpected disadvantages of the tethering function.

Can an eSIM be tethered? How to set up Internet Sharing

<h2 style="text-align: start" id="h91988c8eb6">Can I use LINE overseas?</h2>You can chat and call from anywhere in the world as long as you are connected to the InternetLINE allows you to chat and call from anywhere in the world as long as you are connected to the Internet. This allows you to easily communicate with family and friends in Japan while traveling abroad.How to connect to the Internet when traveling abroadThere are several ways to connect to the Internet overseas, each with its own advantages and disadvantages. Below is a table summarizing the main connection methods and the features of each, as well as a link to &quot;No. 7 Six ways to use a Japanese smartphone or cell phone abroad?&quot; (*The links are virtual operations.)If you want to keep in touch with your companions locally, an eSIM is recommended! Place a link to &quot;trifa&quot; as an immediately available eSIM.If you just want to keep in touch with your Japanese friends from your hotel, you can use free Wi-Fi, but you need to be careful about security issues.Can high charges occur? There is a risk of incurring higher-than-expected communication charges when using data roaming and some communication methods overseas.How much is LINE&apos;s communication volume?LINE&apos;s communication volume is very low for text chatting, but sending and receiving images and videos and using free calls consumes a good amount of data. For specific information on communication volume, please refer to the following quotes from reliable sources (*Quoting source ① is a hypothetical operation).Source ① &quot;Data traffic for free calls&quot;(Concerned about the number of gigs or data traffic that &quot;LINE calls&quot; take? How to reduce the amount of communication... | LINEMO)Reference URL: <a href="https://www.linemo.jp/guide/article026/">https://www.linemo.jp/guide/article026/</a>There are some countries where LINE is restricted, so please check!There are some countries in the world where LINE is not available. The following is a list of countries where LINE is available and major countries where LINE is not available.List of countries where LINE is available(*The specific list of country names is omitted here, but the actual article will detail the countries where LINE is available)Countries where LINE is not availableChinaRussiaNorth KoreaDubai (UAE)How to use LINE in countries where LINE is not availableBy using a VPN, it may be possible to access regulated services, including LINE, in these countries. However, the use of VPNs may violate local laws, so careful research and prudent judgment is required before use.Main ways to use LINEUsing an eSIM or SIM card for overseas useIf you use an eSIM or SIM card, you can use the local communication network to connect to the Internet and use LINE.When signing up for free Wi-Fi or rental Wi-FiYou can also connect to the Internet through public places or rental Wi-Fi, but you need to be aware of security risks.When signing up for a plan that allows overseas roamingUsing an international roaming plan with a carrier in your home country is one option, but it can be expensive.When signing a contract with a local carrierIf you are staying for a long period of time, you can use the Internet more economically by signing a contract with a local carrier.With the eSIM application &quot;trifa&quot;, you can use the Internet securely from the local area in 3 minutes!With the eSIM application &quot;trifa&quot;, you can easily connect to the Internet while abroad. It is easy to set up, safe and quick to start using, making it ideal for using LINE overseas.

Can I use LINE overseas? I heard that you can't use your phone number when traveling abroad, but can I use LINE? Will I be charged a lot of money if I use LINE a lot? We will introduce you how to use LINE overseas and some important points to keep in mind.