International SIM cards and eSIMs: how to choose affordable travel data

In this guide from Viagens e Lugares, you will learn when an eSIM is worthwhile, when a physical SIM still makes sense and what to compare before buying a travel data plan.

Is it worth buying an international SIM card or eSIM?

Yes, especially for international trips, itineraries with frequent journeys, arrivals at large airports, maps, ride-hailing apps and online bookings. Avoid buying without checking whether the plan works at your destination and whether your phone supports eSIM.

International SIM card vs eSIM: which is better?

An eSIM is a digital SIM activated on your phone, usually through a QR code or an app. It is often more convenient because you can buy it before your trip and arrive with internet access ready to use.

An international physical SIM card can still make sense if your phone does not support eSIM, you prefer to swap SIM cards manually or you find a better local plan at your destination.

What should you compare before buying a travel data plan?

• Whether your phone supports eSIM.
• The countries covered by the plan.
• The mobile data allowance.
• The package validity period.
• The speeds available at your destination.
• Whether tethering is allowed.
• The refund policy and support options.
• The final price in Brazilian reais or a foreign currency.

To organise all the details of your trip, also see our guide to planning a trip.

When is an eSIM the best choice?

An eSIM is often best if convenience is your priority. You buy it in advance, activate it on your phone and avoid having to find a shop on arrival. This is especially useful if you need to book a ride, contact your accommodation or use maps as soon as you land.

It is also useful for trips covering several countries, provided the plan covers every destination on your itinerary.

When might a physical SIM be better?

A physical SIM can be worthwhile if you are spending a long time in one country, want to compare local networks or have a phone without eSIM support. In some destinations, buying a local SIM may be cheaper, but it takes time and requires you to check the registration rules.

Where can you buy a travel eSIM?

Airalo and Yesim are two practical options for comparing plans. Before buying, check coverage, data allowance, validity and recent reviews for your destination.

See plans on Airalo

Compare plans on Yesim

What to check before activating your eSIM

• Make sure your phone is network-unlocked.
• Install the eSIM using a stable internet connection.
• Do not delete the eSIM before the end of your trip.
• Read the activation instructions.
• Disable data roaming on your main SIM if necessary.
• Test the plan when you arrive.

Does internet access help you stay safe while travelling?

Yes. Internet access makes it easier to use maps, send messages, confirm bookings, request rides and communicate when something unexpected happens. To reduce risks, combine it with the good practices in our travel safety hub.

How can you save mobile data while travelling?

• Download offline maps before heading out.
• Use trusted hotel Wi-Fi.
• Turn off automatic app updates.
• Avoid watching videos when you are not on Wi-Fi.
• Use data-saving mode.
• Monitor your usage daily.

If your trip includes several cities, also see our guide to getting around while travelling.

Frequently asked questions

Does every phone support eSIM?

No. Only compatible devices support eSIM. Before buying, check your phone model in its settings or on the manufacturer’s website. It is also important to check that your device is unlocked for use with other networks.

Does an eSIM work without an internet connection?

You normally need an internet connection to install an eSIM. Once installed and activated, it uses the local mobile network. It is therefore best to set it up before your trip or while you still have airport or hotel Wi-Fi.

Does an international SIM replace travel insurance?

No. International SIM cards and eSIMs help with communication and internet access, but they do not replace travel insurance. For protection against unexpected events, also see our travel insurance guide.

Key takeaways

• An eSIM is more convenient if you have a compatible phone.
• A physical SIM can be worthwhile for long trips in a single country.
• Compare coverage, data, validity and price.
• Install it using a stable connection before you need it.
• Save data by downloading maps and limiting video use.

Keep planning with our guides to cheap flights, travel destinations and trip planning.

Disclosure: some links in this post are affiliate links. Viagens e Lugares may earn a commission if you buy through them, at no extra cost to you.