How to Use Thailand eSIM for Travel | Preparation Before Staying in Bangkok
For those planning a trip to Thailand or a stay in Bangkok, preparing your smartphone for communication is very important. Whether it's moving from the airport to the hotel, searching for maps, translation, ride-hailing apps, finding cafes and restaurants, or posting on social media, there are many opportunities to use your smartphone during your trip.
Especially in Bangkok, where you often use trains, taxis, and ride-hailing apps to get around, not being connected to the internet can lead to difficulties in checking routes or meeting up.
That's where Thailand eSIM (Thailand eSIM) comes in handy. By adding a communication plan to a compatible smartphone without swapping out a physical SIM card, you can use data communication within Thailand.
In this article, we will clearly explain the benefits of using eSIM during your trip to Thailand, preparations before departure, setup methods, how to choose data capacity, and important points for beginners.
Communication Methods Available During Your Trip to Thailand and Stay in Bangkok
There are mainly four ways to access the internet during your trip to Thailand:
- Overseas roaming with a line contracted in Japan
- Rental Wi-Fi
- Local physical SIM card
- Thailand travel eSIM
All methods allow for communication, but they differ in terms of cost, setup methods, whether you need to pick them up, and portability.
| Comparison Item | Thailand eSIM | Local SIM Card | Rental Wi-Fi | Overseas Roaming |
|---|---|---|---|---|
| Preparation Method | Purchase and set up online | Purchase at the airport or stores | Pre-booking and pickup | Check with your current telecom provider |
| SIM Swap | Not required | Required | Not required | Not required |
| Devices to Carry | Smartphone only | Smartphone only | Wi-Fi router and charger | Smartphone only |
| Usage After Arrival | Easy to start if already set up | Purchase, swap, and set up required | Router needs to be powered on and connected | May work with just a setting change |
| Best For | Those who prioritize convenience | Those using devices that do not support eSIM | Those who want to share with multiple people | Those who want to use their regular line |
Overseas roaming is convenient, but costs and usage conditions vary depending on your contract. Rental Wi-Fi is easy to share among multiple devices, but requires carrying and charging the router, as well as pickup and return.
Local SIM cards can be purchased at airports or telecom company stores in Thailand, but there may be waiting times during busy periods. Additionally, you may need to swap SIM cards, verify your identity, and set up APN settings.
With Thailand eSIM, you can purchase and prepare it online before your trip, making it suitable for those who want to use their smartphone immediately upon arrival in Thailand.
Thailand-compatible eSIM is available here
→ View Thailand eSIM products and pricing plans
Situations Where Data Communication is Necessary During Your Trip to Thailand
There are many situations in Thailand where internet connectivity is necessary.
When Moving from the Airport to the Hotel
When traveling from Bangkok's airport to the city, you can use trains, taxis, or ride-hailing apps. If you are connected to the internet, you can check your current location, fare, travel time, and the hotel's location on the spot.
If you have trouble communicating your destination to the taxi driver, you can show the map or the hotel address on your screen.
When Moving Around Bangkok
Travel times within Bangkok can vary depending on road conditions and time of day. It is convenient to use map apps to change routes or switch between trains and taxis while you are out.
When Checking Translations or Store Information
At street stalls, restaurants, cafes, night markets, shopping malls, and temples, you can use your smartphone for translations, searching reviews, and checking business hours.
When Communicating with Family or Friends
For changes in meeting places or communication while taking separate actions, apps like LINE and various messaging apps are convenient. Even with a data-only eSIM, you can use internet-based voice calls and send messages.
Relying solely on free Wi-Fi at hotels or cafes may leave you without connectivity while on the move. If you want to act freely during your trip, it is reassuring to prepare a communication environment that you can use with your own smartphone.
Benefits of Using Thailand eSIM
No Need to Swap SIM Cards
Thailand eSIM allows you to add a communication plan within your smartphone. Therefore, you do not need to remove the small SIM card you use in Japan, reducing the risk of loss.
Can Be Purchased Online
You can purchase it online before departing for Thailand, reducing the hassle of searching for a SIM card at the local airport or stores.
No Need for Pickup or Return at the Airport
Unlike rental Wi-Fi, there is no need to pick up or return a dedicated router. You can communicate using just your smartphone, making it suitable for those who do not want to carry extra luggage.
Easy to Choose Based on Travel Days
Prepaid Thailand eSIM allows you to choose a plan based on your travel days and required data capacity. Since it is not a monthly contract, it is also a benefit that you can easily purchase only what you need for your travel period.
Can Keep Your Japanese SIM Line
If you have a dual SIM-compatible smartphone, you may be able to add Thailand eSIM while keeping your main line used in Japan.
However, if your Japanese line has overseas roaming enabled, you may incur unintended communication charges. Please switch the line used for mobile data communication to Thailand eSIM.
Who Should Use Thailand eSIM
- Those who want to use maps or ride-hailing apps immediately after arriving in Thailand
- Those who want to reduce the time spent purchasing a SIM card at the airport
- Those who do not want to carry a Wi-Fi router
- Those who frequently use their smartphone while traveling alone or on business
- Those who do not want to remove their physical SIM card from Japan
- Those who plan to act separately in Bangkok
- Those who want to prepare their communication environment before traveling
On the other hand, if the smartphone you are using does not support eSIM, you will need to consider local SIM cards or rental Wi-Fi.
Before purchasing, please check your intended smartphone on the list of eSIM-compatible devices.
How to Set Up Thailand eSIM
The setup for Thailand travel eSIM generally follows these steps:
- Check if your smartphone supports eSIM
- Check the SIM lock status
- Select the number of days and data capacity
- Purchase Thailand eSIM online
- Check the QR code received via email or other means
- Add eSIM from your smartphone's settings screen
- Scan the QR code to register the communication plan
- Turn on the relevant eSIM line after arriving in Thailand
- Select Thailand eSIM for mobile data communication
- Turn on data roaming if necessary
For detailed operation methods, please refer to the eSIM setup guide.
It is Recommended to Set Up Before Departure
A stable Wi-Fi environment may be required when adding eSIM. Therefore, it is reassuring to install it in a stable communication environment, such as at home, before departure.
However, depending on the plan, the usage period may start from the time of installation or from the time you connect to the local line in Thailand. Be sure to check the usage start conditions of the purchased product.
Be Careful with QR Code Handling
The eSIM QR code may only be scannable once. Make sure not to confuse the device you are setting up, and do not delete the eSIM until your trip is over, even after installation is complete.
Pre-Travel Checklist for Settings to Confirm
- Is the device compatible with eSIM?
- Is the SIM lock unlocked?
- Is Thailand included in the supported countries of the plan?
- Do the travel dates match the plan's validity period?
- Have you selected the required data capacity?
- Is the QR code in a viewable state?
- Is the Thailand eSIM line turned on?
- Is Thailand eSIM selected for mobile data communication?
- Is the plan one that requires data roaming?
- Is APN setting necessary?
If you have concerns about the settings, be sure to check the frequently asked questions about eSIM before traveling.
How to Choose Data Capacity for Thailand eSIM
When choosing Bangkok eSIM, it is important to select data capacity according to not only the number of travel days but also how you plan to use your smartphone.
| Main Usage | Data Consumption Trends | Considerations for Choosing Capacity |
|---|---|---|
| LINE & Email | Relatively low | If communication is the main focus, consider a small capacity |
| Maps, Web Search, Translation | Low to moderate | If used daily, allow for some extra capacity |
| Viewing SNS | Moderate | Capacity is consumed by displaying images and short videos |
| Posting Photos & Videos | Moderate to high | If posting frequently, consider a larger capacity |
| Video Viewing | High | If viewing frequently, consider a large or unlimited capacity |
| Video Calls | High | If used for long periods, be cautious about capacity |
| Tethering | Varies based on usage | Select a plan with ample capacity when using a computer |
If your main activities are LINE, map searches, web searches, and translation apps, relatively low capacity may suffice.
On the other hand, if you frequently use Instagram, TikTok, watch videos, make video calls, or upload photos and videos, it is safer to choose a larger capacity.
Especially during your trip to Thailand, you may find yourself moving around for long periods while looking at maps or checking store information and reviews on the spot. Choosing a capacity with a little extra room rather than the bare minimum will make it easier to use.
For guidelines on data usage, please refer to data usage estimates.
Points to Note When Using Thailand eSIM
Data-Only Plans Do Not Allow Use of Phone Numbers or SMS
The Thailand eSIM from JAPAN&GLOBAL is a data-only plan, so it does not support outgoing or incoming calls or SMS using a regular phone number.
However, you can use data communication-based calling and messaging apps like LINE calls, Messenger, and Instagram.
If you need a regular phone number or SMS, please check the details of eSIM with a phone number or whether you can use your current main line in conjunction.
Communication Conditions Vary by Location
Communication conditions may vary depending on the local network you are using, the time of day, buildings, and terrain.
Even in central Bangkok, communication may become unstable in basements, deep inside buildings, or crowded areas. Additionally, in suburban, mountainous, island, or beach areas, the signal may be weaker compared to urban areas.
Do Not Delete eSIM During Your Trip
Once you delete eSIM, you may not be able to reinstall it with the same QR code. If you cannot connect, do not delete it immediately; first, check your line settings, data roaming, and APN settings.
Be Cautious of Communication via Your Japanese Main Line
If you have retained your Japanese line with dual SIM, there is a possibility that mobile data communication may mistakenly switch to your Japanese main line.
To avoid high overseas roaming charges, select Thailand eSIM for mobile data communication and turn off automatic switching of mobile data communication if necessary.
Points to Check if eSIM Does Not Connect After Arriving in Thailand
If you cannot connect after arriving in Thailand, please check the following items in order before deleting eSIM.
- Turn on airplane mode once and then turn it off
- Check if the Thailand eSIM line is turned on
- Check if Thailand eSIM is selected for mobile data communication
- Turn on data roaming
- Check if APN settings are necessary
- Set network selection to automatic
- Restart your smartphone
- Check the plan's start date and validity period
If you still cannot connect after checking the settings, prepare your device name, OS, order number, and a screenshot of the settings screen to make it easier to communicate your situation to support.
For general troubleshooting methods, please refer to how to check when eSIM does not connect.
Frequently Asked Questions About Thailand eSIM
When Should I Set Up Thailand eSIM?
It is recommended to complete the addition of eSIM before departure in a stable Wi-Fi environment. However, some products may start the usage period from the time of installation, so please check the usage start conditions of the purchased plan.
Can I Use Thailand eSIM Immediately After Arriving in Bangkok?
If you complete the installation before departure and correctly set the Thailand eSIM line, mobile data communication, and data roaming after arrival, you can use it after connecting to the local network.
Does Thailand eSIM Come with a Phone Number?
The data-only Thailand eSIM does not come with a regular phone number. You can use apps that utilize data communication, such as LINE calls.
Is APN Setting Necessary for Thailand eSIM?
Depending on the plan and device, it may be automatically set or require manual configuration. Please check the APN information provided after purchase.
Can I Use Tethering with Thailand eSIM?
The ability to tether depends on the plan and device you are using. If you plan to connect a computer or other devices, please check the compatibility before purchasing.
How Many GB Do I Need for My Trip to Thailand?
If your main activities are maps, searches, and messaging, you can manage with relatively low capacity. If you frequently post on social media, watch videos, make video calls, or use tethering, consider a large capacity plan.
Conclusion | Prepare Thailand eSIM Before Your Trip to Bangkok
During your trip to Thailand or stay in Bangkok, there are many situations where you will need smartphone communication, such as moving from the airport, searching for maps, translation, ride-hailing apps, and checking store information.
Thailand eSIM allows you to use it without swapping SIM cards and does not require pickup or return at the airport. It is easy to prepare before departure, making it suitable for those who want to use the internet immediately upon arrival in Thailand.
Before purchasing, please check the following items:
- Is your smartphone compatible with eSIM?
- Do the travel days and validity period match?
- Is the required data capacity included?
- Is data roaming or APN setting necessary?
- Do you need a phone number or SMS?
Before your trip to Thailand, check the number of days, data capacity, compatible devices, and setup methods, and choose a Thailand eSIM that fits your travel style.
Thailand-compatible eSIM is available here
→ View Thailand eSIM products and pricing plans
