International travel is exciting, but receiving an unexpectedly large phone bill when you return home is not.
One of the easiest ways to increase the cost of a trip is to use your regular mobile plan overseas without understanding how international roaming works. Your phone may continue connecting to mobile networks, downloading emails, refreshing apps, synchronising photos and receiving notifications even when you are not actively using it.
The good news is that you do not necessarily need to stop using your phone when travelling.
There are several ways to stay connected while keeping your mobile costs under control, including using Wi-Fi, purchasing a local SIM, choosing a travel SIM, or installing a travel eSIM.
In this guide, we will explain how to avoid international roaming charges, what causes unexpected roaming costs, and which connectivity option may make the most sense depending on your destination and travel style.
What Are International Roaming Charges?
International roaming happens when your mobile phone connects to a cellular network outside the network or country covered by your regular mobile plan.
For example, imagine that your normal mobile service is from a carrier in Australia. When you travel to Japan, France, Thailand or the United States, your phone may connect to a local partner network.
That connection allows you to continue using mobile data, calls and text messages, but your home carrier may charge you according to its international roaming terms.
The cost depends heavily on your mobile provider and plan.
Some carriers offer international travel packages or daily roaming passes. Others may charge separately for data, calls and messages. If you use your phone without checking the applicable international rates first, even ordinary activities can potentially become expensive.
The important point is this:
Your phone does not automatically know that you want to avoid expensive roaming.
If your normal SIM remains active and your device is allowed to use cellular data overseas, it may connect to a foreign network automatically.
That is why preparing your phone before departure is one of the most effective ways to avoid unexpected charges.
Why Can Roaming Charges Become So Expensive?
It is easy to assume that you only use mobile data when you actively open an app.
In reality, smartphones perform many background activities automatically.
For example, your phone may use cellular data for:
- Email synchronisation
- App updates
- Cloud backups
- Photo synchronisation
- Social media notifications
- Weather updates
- Maps
- Messaging applications
- Automatic downloads
- Streaming services
- Location-based services
These activities can happen without you deliberately opening an app.
Some mobile carriers also charge separately for international calls and text messages.
For this reason, simply saying “I won’t use my phone much” is not always enough.
The safer approach is to decide before your trip how your phone will connect to the internet.
1. Check Your Mobile Plan Before You Travel
The first step in learning how to avoid international roaming charges is to check what your existing mobile plan actually includes.
Do not assume that your domestic data allowance automatically works overseas.
Look at your carrier’s international roaming information and check:
- Which countries are included
- Whether international data is included
- How much data you receive
- Whether calls are included
- Whether text messages are included
- Whether there is a daily roaming fee
- Whether charges are based on usage
- Whether your plan has international travel add-ons
- Whether there are speed limitations
International roaming terms can vary significantly between plans and destinations.
For example, some carriers offer a fixed daily fee, while others may charge according to data usage. Verizon, for example, explains that international usage can be billed through an international travel plan or on pay-as-you-go rates depending on the customer’s plan and destination.
Never assume. Check before you leave.
A few minutes spent reviewing your plan can potentially save you from an unpleasant bill later.
2. Turn Off Data Roaming on Your Main SIM
If you do not intend to use your normal carrier for mobile data overseas, turning off data roaming is one of the simplest precautions.
On many smartphones, you can find the option under the mobile or cellular network settings.
The exact menu differs between iPhone and Android devices, but look for an option such as:
Data Roaming → Off
This prevents your primary SIM from using cellular data while connected to a foreign network.
However, there is an important distinction:
Turning off data roaming is not necessarily the same as completely disabling your SIM.
Depending on your carrier and device configuration, calls or text messages may still be possible and may have separate international charges.
If you want to use a second SIM or eSIM for data, carefully configure which line is responsible for mobile data.
3. Use Airplane Mode When You Do Not Need Cellular Service
Airplane Mode is another straightforward way to prevent cellular roaming.
When enabled, your phone disconnects from cellular networks while allowing you to manually turn Wi-Fi back on.
This can be useful when:
- You are on a flight
- You are waiting at an airport
- You are sleeping
- You are somewhere with Wi-Fi
- You do not need mobile service temporarily
Some carriers themselves recommend Airplane Mode as a way to prevent unintended international cellular usage.
However, Airplane Mode is not always the most convenient solution for travellers.
You may still want mobile data for:
- Google Maps
- Ride-hailing apps
- Translation
- Travel bookings
- Messaging
- Emergency information
- Navigation
That is where alternative connectivity options become useful.
4. Use Wi-Fi When It Is Available
Wi-Fi is one of the easiest ways to get online without using cellular roaming data.
You can often find Wi-Fi in:
- Hotels
- Airports
- Cafés
- Restaurants
- Libraries
- Shopping centres
- Train stations
- Tourist attractions
Using Wi-Fi for large downloads, software updates and video streaming can significantly reduce cellular data consumption.
However, relying exclusively on Wi-Fi has an obvious limitation:
You cannot always find reliable Wi-Fi when you need it.
Imagine arriving in Tokyo after a long flight and needing directions to your hotel.
Or arriving in Paris and discovering that your hotel Wi-Fi is only available after check-in.
Or trying to order a ride from an airport where public Wi-Fi is overloaded.
For this reason, many travellers prefer having a mobile data connection available as a backup.
5. Consider a Local SIM Card
Buying a local SIM is another traditional way to reduce international roaming costs.
Instead of using your home carrier’s international roaming service, you purchase a SIM from a mobile provider in your destination country.
This can work particularly well for:
- Long-term travellers
- Digital nomads
- Students
- People staying in one country for several weeks or months
A local SIM may provide a local phone number and access to local mobile services.
The disadvantage is convenience.
You may need to:
- Find a local provider
- Purchase the SIM
- Remove your existing SIM
- Install the new SIM
- Configure the device
- Deal with language differences
- Keep track of your original SIM
There is also the possibility of losing your original physical SIM while travelling.
For a short holiday, this can be more effort than some travellers want.
6. Use a Travel SIM
A travel SIM is designed specifically for international travellers.
Instead of buying a SIM after arriving at your destination, you can purchase a travel SIM before departure.
Depending on the product, a travel SIM may cover one country or multiple countries.
For example, if your itinerary includes several European countries, a regional travel SIM may be more convenient than purchasing a separate SIM every time you cross a border.
Travel SIMs can be particularly useful if your phone does not support eSIM technology.
The main thing to check is coverage.
Do not buy a travel SIM simply because it says “Europe” or “Asia” on the package.
Check the actual country list and understand:
- Included countries
- Data allowance
- Validity period
- Network provider
- Calls
- Text messages
- Tethering/hotspot support
- Activation requirements
7. Consider a Travel eSIM
For travellers with a compatible unlocked phone, a travel eSIM can be one of the most convenient ways to stay connected overseas.
An eSIM is a digital SIM profile that can be installed directly on a compatible device.
Instead of waiting for a physical SIM card, you can usually receive installation information digitally and install the eSIM before travelling.
The basic process is generally:
Buy → Receive eSIM → Install → Activate → Connect
One major advantage is that many modern smartphones can keep the primary SIM installed while using the eSIM for mobile data.
That means you can potentially keep your normal number available while using the travel eSIM as your data connection.
However, the exact behaviour depends on your phone, carrier and eSIM plan.
8. Choose a Travel eSIM Based on Your Itinerary
One of the most important things to understand is that not every travel eSIM covers every country.
There are generally three useful categories.
Single-country eSIM
This is designed for travellers staying primarily in one destination.
Examples include:
- Japan
- South Korea
- Thailand
- Vietnam
- Singapore
- Indonesia
This can make sense when your entire trip is concentrated in one country.
Regional eSIM
A regional eSIM covers multiple countries in a geographic area.
This can be useful for travellers visiting several destinations during one trip.
For example:
Japan → South Korea → Singapore
or
France → Germany → Italy → Spain
Instead of changing your connectivity solution between destinations, one regional plan may cover multiple stops.
Multi-country travel eSIM
Some plans are designed for broader international itineraries.
The important rule is:
Always check the coverage list before purchasing.
Global Starlink, for example, currently offers both country-specific and regional travel SIM/eSIM options. Its Asia collection includes options for destinations such as Japan, Indonesia, China, South Korea, Vietnam, Thailand, Singapore, the Philippines, Malaysia and India, as well as regional options.
For Europe, the company also lists regional eSIM products covering multiple European countries and networks.
9. One Option Worth Considering: Global Starlink Travel SIMs & eSIMs
If you are looking for an alternative to international roaming, Global Starlink is one option worth comparing alongside other travel connectivity providers.
The important point is not simply the brand name. What makes the service potentially useful for travellers is the range of destination-specific and regional products available.
Its current catalogue includes travel SIMs and eSIMs for destinations across Asia, Europe and other regions.
For example, its Asia collection includes options such as:
- Asia regional eSIM
- Japan eSIM
- South Korea eSIM
- China eSIM
- Thailand eSIM
- Singapore eSIM
- Vietnam eSIM
- Indonesia eSIM
- Malaysia eSIM
- Philippines eSIM
- India eSIM
It also offers regional products for travellers visiting multiple destinations.
For Europe travellers, there are also products covering multiple European countries. One current KPN-based Europe & UK eSIM, for example, offers multiple data allowances and coverage across numerous European destinations, with 4G/5G access where supported by the local network.
That makes this type of service worth considering if your goal is to replace expensive roaming with a prepaid travel connectivity option.
Explore travel SIM and eSIM options
If you want to compare available destinations and plans, you can browse the current range here:
Explore Global Starlink Travel SIM & eSIM Options
Tip: Do not choose a plan based only on the lowest price. Check the countries covered, data allowance, validity period, network, hotspot support and activation instructions before ordering.
10. Check Whether Your Phone Supports eSIM
Before buying an eSIM, confirm that your smartphone supports the technology.
Many newer iPhone, Samsung Galaxy, Google Pixel and other devices support eSIM, but compatibility varies by model and region.
Your phone also needs to be unlocked if you want to use a travel eSIM from another provider.
Some eSIM providers recommend checking for an EID in the device settings or by using the appropriate device code.
Global Starlink’s own product information recommends checking eSIM compatibility before purchasing and notes that an EID can indicate eSIM support.
This is important because purchasing an incompatible eSIM can create unnecessary hassle.
11. Turn Off Automatic Data Switching
This is an especially important setting for travellers using two SIMs.
Suppose you have:
Primary SIM: your normal mobile carrier
Secondary eSIM: your travel data plan
You want the travel eSIM to provide mobile data.
If your phone is allowed to automatically switch between cellular data lines, it may potentially fall back to your primary SIM.
That defeats the purpose of buying a travel eSIM to avoid roaming charges.
Before leaving home, check your mobile data settings and make sure:
Travel eSIM = Primary Data Line
and, where applicable:
Allow Cellular Data Switching = Off
The exact setting name varies by device.
Global Starlink also specifically advises users to disable automatic data switching when using its eSIMs.
12. Download Maps Before You Leave
Another simple way to reduce mobile data consumption is to prepare your phone before the trip.
Download offline maps for destinations where possible.
This can be particularly helpful if you are travelling somewhere with unreliable connectivity.
Offline maps can help you navigate:
- Airports
- Train stations
- Tourist areas
- City centres
- Driving routes
You should still keep some mobile data available because live traffic, updated locations, ride-hailing and other services may require an internet connection.
13. Restrict Background Data
If you are using a limited travel data plan, reduce unnecessary background activity.
Consider disabling or restricting:
- Automatic app updates
- Cloud photo backups
- Automatic video downloads
- High-quality video streaming
- Automatic podcast downloads
- Large file synchronisation
You can also configure individual applications so that they only update when connected to Wi-Fi.
This is useful whether you are using a travel eSIM, local SIM or another mobile data solution.
14. Be Careful With Video Streaming
Streaming video can consume significantly more data than basic activities such as sending messages or checking directions.
If you are travelling with a small data allowance, avoid watching high-resolution video over cellular data unless necessary.
Instead:
- Download movies before travelling
- Download music playlists
- Use offline podcasts
- Reduce streaming quality
- Save large downloads for Wi-Fi
This helps make a travel data plan last longer.
15. What Is the Best Way to Avoid International Roaming Charges?
There is no single solution that is best for every traveller.
The right choice depends on your destination, phone and travel duration.
| Option | Best for | Main advantage | Potential drawback |
|---|---|---|---|
| Wi-Fi | Short occasional use | No cellular data cost | Not available everywhere |
| Home carrier roaming | Convenience | Keep everything together | Can be expensive |
| Local SIM | Long stays | Local service | More setup |
| Travel SIM | Phones without eSIM | Easy international option | Physical SIM required |
| Travel eSIM | Compatible smartphones | Convenient and flexible | Requires compatible device |
| Pocket Wi-Fi | Groups | Multiple devices | Carry/charge another device |
For many modern travellers, a travel eSIM is particularly attractive because it combines convenience with the ability to avoid using the primary SIM’s international data service.
But you should compare the available options rather than automatically choosing one provider.
Buyer Guide: How to Choose a Travel SIM or eSIM
Before purchasing a travel SIM or eSIM, use this checklist.
1. Destination coverage
Does the plan cover every country on your itinerary?
If you are visiting five countries, make sure all five are included.
2. Data allowance
Think about how much data you actually need.
Light users may mainly need:
- Maps
- Ride-hailing
- Web browsing
Heavy users may also need:
- Video streaming
- Hotspot
- Social media
- Video calls
- Laptop connectivity
3. Validity period
Check whether the plan lasts:
- 7 days
- 15 days
- 30 days
- Longer
Also check when validity begins.
Some plans begin when activated, while others may have purchase or installation deadlines.
4. Network
Look at which local network or networks the product uses.
A cheap plan is less useful if coverage does not match your itinerary.
5. Calls and texts
Many travel eSIMs are data-only.
That is not necessarily a problem if you use:
- Messenger
- FaceTime
- Skype
- Other internet-based communication apps
But if you need a traditional phone number, verify this before buying.
For example, the Global Starlink KPN Europe & UK eSIM currently listed on its site is data-only and does not provide a phone number.
6. Hotspot support
If you plan to connect a laptop or tablet, confirm whether tethering is supported.
7. Phone compatibility
Make sure your phone:
- Supports eSIM, if purchasing an eSIM
- Is unlocked
- Supports the required network bands
8. Activation process
Read the activation instructions before travelling.
Some products require a QR code, Wi-Fi connection or specific settings.
A Simple Pre-Travel Checklist to Avoid Roaming Charges
Before boarding your flight, take five minutes to check these settings.
Before departure
☐ Check your carrier’s international roaming rates
☐ Decide whether you will use roaming, local SIM, travel SIM or eSIM
☐ Confirm your phone is unlocked
☐ Check eSIM compatibility
☐ Purchase and install your travel eSIM if appropriate
☐ Download offline maps
☐ Download music and entertainment
☐ Disable automatic app updates over cellular data
After arriving
☐ Select your travel SIM/eSIM for mobile data
☐ Turn off automatic data switching
☐ Disable data roaming on your primary SIM if you do not intend to use it
☐ Confirm the travel eSIM is connected to a supported network
☐ Test Google Maps and messaging
☐ Monitor your data usage
This preparation can prevent many of the common mistakes that lead to unexpected roaming costs.
FAQ: Avoiding International Roaming Charges
Can I use my phone overseas without paying roaming charges?
Yes. Depending on your situation, you can use Wi-Fi, a local SIM, a travel SIM or a travel eSIM instead of using your regular carrier’s international roaming service.
However, you should check your normal SIM settings carefully to prevent accidental cellular usage.
Should I turn off data roaming when travelling?
If you do not intend to use your primary carrier for international mobile data, turning off data roaming is generally a sensible precaution.
The exact settings and charges depend on your carrier and phone.
Does airplane mode prevent roaming charges?
Airplane Mode disconnects the phone from cellular networks. You can then manually enable Wi-Fi if you want internet access.
It is useful when you do not need cellular connectivity, although it is less convenient if you need mobile data while travelling.
Is an eSIM better than international roaming?
It depends on your trip.
A travel eSIM can be an attractive alternative when you want mobile data without relying on your home carrier’s international roaming service.
However, compare coverage, data allowance, validity and price before choosing.
Can I use my normal SIM and a travel eSIM at the same time?
Many compatible dual-SIM phones can keep a physical SIM and eSIM active simultaneously.
However, the configuration depends on the device.
If your goal is to avoid roaming charges, make sure the correct line is selected for mobile data and disable automatic data switching where appropriate.
Will a travel eSIM give me a phone number?
Not necessarily.
Many travel eSIMs are data-only.
If you need traditional calls and SMS, check the specific plan before buying.
Some travel eSIMs instead rely on internet-based apps such as WhatsApp or Messenger for communication.
Can I use one eSIM in multiple countries?
Yes, if the specific eSIM plan supports multiple countries.
Regional travel eSIMs are designed for this purpose.
Always check the provider’s current coverage list before purchasing because coverage differs between plans.
Is a travel SIM cheaper than roaming?
It can be, but there is no universal answer.
Compare the total cost of your carrier’s international roaming option against the travel SIM or eSIM, taking into account:
- Number of travel days
- Data requirement
- Countries visited
- Calls
- Texts
- Activation fees
- Data limits
Can I use a travel eSIM for hotspot?
Some travel eSIMs support tethering while others may restrict it.
Check the individual product specifications before purchasing if hotspot access is important to you.
When should I install my travel eSIM?
It depends on the product.
Some eSIMs can be installed before departure but only begin their validity when they connect to a supported network.
Others have specific activation requirements.
Always follow the instructions for the exact plan you purchase. For example, Global Starlink’s KPN Europe & UK eSIM instructions recommend installation using stable Wi-Fi before travel and activation according to the supplied instructions.
Final Thoughts: The Best Way to Avoid International Roaming Charges
The easiest way to avoid international roaming charges is not simply to stop using your phone.
Instead, plan your connectivity before you travel.
Start by checking what your existing mobile plan includes. If international roaming is expensive or unsuitable for your trip, consider alternatives such as hotel and public Wi-Fi, a local SIM, a travel SIM or a travel eSIM.
For travellers with compatible unlocked smartphones, a travel eSIM can be particularly convenient because you can potentially keep your normal SIM while using another plan for mobile data.
The most important thing is to choose based on your actual itinerary.
If you are travelling to one country, a country-specific plan may be enough. If you are crossing several borders, a regional plan may be more convenient.
Global Starlink is one provider worth comparing, particularly if you are looking for destination-specific or regional travel SIM and eSIM options. Its current catalogue includes products covering destinations across Asia and Europe, including both individual-country and multi-country options.
Compare available travel SIM and eSIM options
Ultimately, the best strategy is simple:
Check your roaming plan → choose an alternative if necessary → configure your phone correctly → monitor your data → enjoy your trip without worrying about an unexpected mobile bill.
That small amount of preparation before departure can make a significant difference to your travel experience.