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Choosing internet access while traveling abroad requires considering cost, data allowance, and convenience. Roaming is practical for short trips, local SIM cards may be cheaper for longer stays, and eSIMs offer flexibility without a physical card. Each has advantages and drawbacks. Before departure, compare prices, validity periods, country coverage, and device compatibility to stay connected without unnecessary costs.
Internet access has become essential when traveling abroad. From finding routes on Google Maps and booking transportation to making digital payments and contacting family, many travel activities increasingly depend on connectivity.
However, staying online abroad requires different preparation from using the internet in Indonesia. Domestic data packages may not work at your destination, while accessing the internet without a suitable international package can result in additional charges.
Travelers currently have three main ways to stay connected: international roaming, a local SIM card, and an eSIM. Each differs in how it works, its cost, and its flexibility.
So which is more affordable for international travel? Is roaming always more expensive than a local SIM card? Or is an eSIM the most convenient option? First, let us explore why internet access matters when traveling.
According to the International Telecommunication Union (ITU) Facts and Figures 2025 report, around 6 billion people, or 74% of the global population, used the internet in 2025. This was up from approximately 5.8 billion users in 2024. The figures illustrate the growing role of internet access in everyday activities worldwide.
For international travelers, an internet connection serves several purposes that can make journeys more convenient and independent. Activities that often require connectivity include:
Navigation: Using Google Maps or transport apps to find routes to hotels, restaurants, and attractions.
Transportation: Booking ride-hailing services, checking train schedules, or buying tickets.
Communication: Contacting family, friends, or hotels through messaging apps.
Reservations: Accessing flight tickets, accommodation confirmations, and attraction bookings.
Payments: Using banking apps or digital payment services supported at the destination.
Emergencies: Finding healthcare facilities, Indonesian diplomatic missions, or assistance services.
Nevertheless, network quality and internet costs vary across countries. Coverage, connection speeds, and data package rates depend on the operator and location.
Choosing an internet service before departure is therefore an important step, particularly for travelers who rely on their smartphones throughout the trip.
International roaming allows customers to use their home operator’s phone number abroad through partner networks in the destination country.
According to the GSMA, roaming enables mobile devices to remain connected when outside their home operator’s network, including for internet access, calls, and messages.
For example, an Indonesian traveler visiting Japan can continue using their Indonesian number through their operator’s roaming service, provided the destination and network are supported.
No need to change SIM cards. Users can keep their primary number without buying another card.
Convenient for short trips. Roaming packages can be purchased before departure so connectivity is available upon arrival.
Keep your Indonesian number. Useful for communications and receiving SMS messages on your primary number.
Relatively simple setup. Users generally only need to activate a package and configure roaming according to their operator’s instructions.
Despite its convenience, roaming has limitations worth considering. Roaming packages may cost more than certain local plans, particularly for extended trips or data-intensive activities.
Some packages also impose daily data limits or a Fair Usage Policy (FUP). Once a threshold is reached, speeds may be reduced or additional usage charged under the package terms.
Another risk is roaming without an appropriate package. If a device connects to a foreign network and uses data at standard rates, charges may increase unexpectedly.
Roaming may be suitable when you:
Before activating the service, check the covered countries, total data allowance, validity period, extra charges, and when the package becomes active.
A local SIM card is issued by a telecommunications operator in the destination country. Travelers can buy a prepaid card to access the internet during their stay.
For example, visitors to Thailand can buy a tourist SIM from a local operator and use the data included in their chosen package.
Local SIM cards are commonly sold at airports, operator stores, telecommunications outlets, and other authorized retailers.
Potential savings on longer trips. Some operators offer generous data allowances and longer validity periods.
More package options. Travelers can choose plans suited to daily or monthly internet needs.
Access to a local operator’s network. Connection quality depends on the selected operator’s coverage and network conditions.
May include a local number. Useful for services requiring a destination-country phone number, if the plan supports calls or SMS.
One drawback is having to purchase and insert a physical card. In some countries, travelers may need to show their passport or register their identity before using the service.
If a smartphone supports only one physical SIM, users may need to remove their Indonesian card to insert the local one. This matters if the primary number is still needed for verification texts or important communications.
A local SIM card may be suitable when you:
Before purchasing, make sure your device is not carrier-locked and supports the networks used at your destination.
An eSIM, or embedded SIM, is a digital SIM technology that lets users activate cellular service without inserting a physical SIM card.
Unlike a conventional SIM card, an eSIM uses a digital profile that can be installed on a compatible device.
For travel, visitors can purchase an eSIM package from a local operator or international connectivity provider before departure. After purchase, the provider generally supplies a QR code or another activation method for installing the eSIM profile on a smartphone.
Apple explains that supported iPhone models allow users to retain their primary number while using a travel eSIM as an additional data line. This capability depends on the device model and carrier settings.
No physical card required. Users do not need to open the SIM tray or keep an extra card.
Can be purchased before departure. An internet package can be arranged before arriving at the destination.
Convenient for multi-country trips. Some providers offer regional or international plans covering several countries.
Keep your primary number. On compatible devices, the Indonesian number can remain active while the eSIM provides internet access.
Flexible packages. Plans are available by data allowance, validity period, or coverage region.
Not all smartphones support eSIMs. Availability can also vary by model, country of sale, and operator.
Some travel eSIM packages provide data only, without a local phone number or conventional calls and SMS.
Users must also check when the package validity begins. Some plans start upon installation, while others activate only when connected to a network in the destination country.
An eSIM may be suitable when you:
Also check whether the eSIM package requires data roaming to be enabled on the eSIM line. Settings vary by provider.
The following table compares these options in terms of convenience, cost, and flexibility.
Aspect | Roaming | Local SIM Card | eSIM |
|---|---|---|---|
How it works | Indonesian number via partner network | Insert a SIM card from the destination country | Activate a digital SIM profile |
Convenience | Very convenient | Must purchase and insert a card | Convenient on compatible devices |
Potential cost | Depends on home operator package | May be economical for longer use | Competitive, depending on provider |
Indonesian number | Remains in use | Depends on dual-SIM support | Can remain active on supported devices |
Multi-country travel | Depends on package coverage | Check coverage of each card | Regional packages available |
Compatibility | Roaming support required | SIM and network support required | eSIM support required |
Best for | Short trips and convenience | Long trips or local-number needs | Travelers prioritizing flexibility |
Disclaimer: This table provides a general comparison rather than an absolute ranking. Prices, network quality, calling services, and country coverage vary by operator and package. Local SIM cards and eSIMs may also offer multi-country packages, depending on the provider.
So which is cheaper: roaming, a local SIM card, or an eSIM? No single option is always the least expensive for every trip.
International internet costs depend on factors such as the destination, trip length, data requirements, package type, and operator. For a fair comparison, travelers should calculate the total cost of the data needed for the entire trip, rather than focusing only on the upfront price.
Suppose a traveler is going abroad for seven days and expects to need around 7 GB of data.
The following is an illustrative calculation using hypothetical prices.
Option | Illustrative Package | Cost |
|---|---|---|
Roaming | 1 GB per day for 7 days | Rp245,000 |
Local SIM Card | 10 GB valid for 10 days | Rp180,000 |
eSIM | 10 GB valid for 10 days | Rp160,000 |
Disclaimer: These figures are examples to illustrate cost comparisons, not actual prices from any operator or country. The roaming package in this example has a daily allowance, so its terms are not directly equivalent to the total data allowances of the local SIM and eSIM.
In this illustration, the eSIM has the lowest upfront cost. However, this does not mean eSIMs are always cheapest. For instance, a data-only eSIM may involve extra costs if the traveler needs regular voice calls. Conversely, roaming may be attractive if an Indonesian operator offers a promotion or includes roaming in an existing customer plan.
1. Total data allowance
A cheaper package may not offer better value if the data allowance is insufficient. Check whether the allowance is provided as one total or limited per day.
2. Package validity
Ensure the package covers the entire trip, including departure and return days if internet access is needed.
3. Country coverage
For multi-country travel, check whether a single package works in every destination.
4. Internet speed limits
Some packages reduce connection speeds after a specified amount of data has been used.
5. Additional charges
Check for activation fees, data top-ups, calls, SMS, and out-of-package data charges.
Beyond comparing these cost components, pay attention to how you use the internet during your trip. Managing your data allowance effectively helps you get the most out of your package while avoiding unnecessary extra expenses.
In addition to choosing the right package, managing data usage can help reduce costs abroad.
Some navigation apps let users download maps of selected areas for use without an internet connection.
This can reduce data usage when looking up locations, although features such as live traffic updates still require connectivity.
Use hotel Wi-Fi or official networks when downloading large files, updating apps, or backing up photos.
Avoid accessing sensitive information over unfamiliar public networks. For banking or important transactions, a personal cellular connection is often safer than untrusted public Wi-Fi.
App and operating system updates can consume substantial amounts of data.
Set your smartphone to update over Wi-Fi, especially when using a limited data package.
Some apps continue using the internet even when not open, for example to sync photos, email, or backups.
Enable your device’s data-saving feature if available.
Streaming high-resolution video can use data much faster than activities such as reading articles or messaging.
If you plan to watch films or listen to music during your trip, consider downloading content over Wi-Fi before departure.
When using a local SIM or eSIM, make sure the correct line is selected for mobile data. Disable data roaming on your Indonesian number if it is not needed or covered by an appropriate package. However, do not automatically disable roaming on every line, because some travel eSIMs require it to connect.
Check data usage through your operator’s app or smartphone settings. Monitoring usage helps you estimate whether your allowance will last until the end of the trip.
Alongside these saving tips, it is important to understand common mistakes when choosing and using international internet packages. Knowing what to avoid can help minimize connection problems and extra charges during your journey.
Mistakes when choosing or activating an internet package can leave you without connectivity when you need it or result in additional charges.
Here are some pitfalls to avoid.
Buying a package without checking device compatibility. Not every smartphone supports eSIM or all mobile networks in the destination country. Check your device specifications before purchasing.
Overlooking the activation date. Some packages start their validity period at purchase or installation, while others begin only after connecting to a network at the destination.
Ignoring fair usage limits. Even packages advertised with large or unlimited data allowances may be subject to FUP terms and reduced speeds.
Assuming every package includes calls and SMS. Some travel eSIMs provide internet access only. If you need a local number or conventional calls, choose a package that supports them.
Not preparing a backup connection. If network service is disrupted, trusted Wi-Fi access or important contact information saved offline can help you continue your trip.
Roaming, local SIM cards, and eSIMs each have their strengths. Roaming is convenient, local SIM cards may save money on longer trips, and eSIMs provide flexibility without a physical card.
Before departure, choose your internet package based on its cost, data allowance, validity period, and your travel needs.
Alongside arranging your internet connection, consider Oona Travel Insurance to help protect you against unexpected risks while traveling abroad.
With careful preparation, your journey can feel more comfortable, convenient, and worry-free.
