Travel eSIM explained: how it works and how to set one up

What is a travel eSIM?

An eSIM is a digital SIM that you install on your phone without a physical card. It stores the same network information as a plastic SIM, but it lives inside your phone's settings. You can add, switch or remove eSIM profiles without swapping cards.

A travel eSIM is an eSIM profile designed for use abroad. It gives you a local data connection in another country or region. You buy it online, install it before you fly, and activate it when you arrive.

How does a travel eSIM work?

When you buy a travel eSIM, the provider sends you a QR code or an activation code. You scan or enter this code in your phone's mobile network settings. The eSIM profile downloads to your phone and connects to a partner network when you reach your destination.

Most travel eSIMs are data-only. They do not come with a local phone number for calls or texts. You keep your normal SIM active for your usual number, and use the eSIM for mobile data.

What do you need before you buy?

Your phone must support eSIM. Most newer iPhones, Google Pixels and Samsung Galaxy models do, but older phones may not. Check your phone's specifications or look in your settings for an 'Add eSIM' option.

Your phone must also be unlocked from its network. If you bought your phone on a contract, it may be locked to that carrier. Contact your carrier to unlock it before you travel.

You need a Wi-Fi connection to install the eSIM. Do this at home or at your hotel before you leave. Once installed, the eSIM stays on your phone until you delete it.

How do you set up a travel eSIM?

Buy your eSIM from a provider and receive the QR code or activation details by email. Open your phone's settings and find the option to add a mobile plan. Scan the QR code or enter the details manually.

Follow the on-screen steps to download the eSIM profile. Label it clearly, such as 'Japan travel' or 'Europe trip'. Keep your normal SIM as your primary line for calls and texts.

Before you fly, switch off data roaming on your home line. This stops your normal SIM from using data abroad and avoids surprise charges. When you land, turn on the travel eSIM and enable data roaming for that line only.

• Check your phone supports eSIM and is unlocked.
• Buy the eSIM and get the QR code.
• Install over Wi-Fi before you leave.
• Label the eSIM and keep your normal SIM for calls.
• Turn off data roaming on your home line.
• Switch on the eSIM when you land.

What should you check before you buy?

Plans cover specific countries or regions and last a set number of days. Check both before you pay. A plan for France may not cover Switzerland, and a seven-day plan stops working on day eight.

Compare the data amount, the validity period and the countries covered. A plan with 1 GB may not be enough for maps, photos and video calls. A larger plan may be better value if you use data heavily.

Look before you book. Compare plans on FindMyFlight to see prices side by side. You book and pay the provider directly, and FindMyFlight never adds anything to the fare.

How do you avoid roaming charges?

The main risk is your home SIM using data abroad. Switch off data roaming on your home line before you leave. On most phones, this is a simple toggle in mobile network settings.

Keep your normal SIM for calls and texts, but be aware that receiving calls or sending texts may still cost money. Check your carrier's roaming rates before you travel.

If you need to make calls, use apps like WhatsApp or FaceTime over the eSIM's data connection. This keeps costs low and works wherever you have data.

Can you use a travel eSIM for calls and texts?

Many travel eSIMs give data only, so keep your normal SIM for calls and texts. Your phone can use two SIMs at once: one for data and one for your usual number.

If you need a local number abroad, some providers offer eSIMs with voice and text. These are less common and often cost more. Check the plan details before you buy.

For most travellers, a data-only eSIM plus a messaging app is the simplest option. You stay reachable on your normal number and use data for everything else.

What happens when your eSIM plan ends?

When your plan's validity period ends, the eSIM stops connecting to the network. You can usually buy a new plan from the same provider and install it as a new eSIM.

You can delete the old eSIM profile from your phone to keep things tidy. This does not affect your normal SIM or any other eSIMs you have installed.

Some providers let you top up an existing eSIM, but this varies. Check the provider's app or website for options. Always check the terms before you buy.

Questions and answers

Do all phones support eSIM?

No. Your phone must support eSIM and be unlocked from its network. Check your phone's specifications or look for an 'Add eSIM' option in settings. Contact your carrier to unlock if needed.

Can I use a travel eSIM and my normal SIM at the same time?

Yes. Most phones let you use two SIMs at once. Keep your normal SIM for calls and texts, and use the travel eSIM for data. Switch off data roaming on your home line to avoid charges.

Do travel eSIMs include a phone number?

Many travel eSIMs are data-only and do not include a phone number. You keep your normal number for calls and texts. Some providers offer voice and text eSIMs, but check the details first.

When should I install my travel eSIM?

Install the eSIM over Wi-Fi before you leave. This takes a few minutes and avoids problems at the airport. Switch it on when you land and turn off data roaming on your home line.

How do I choose the right travel eSIM?

Compare the data amount, the validity period and the countries covered. Check that the plan covers your destination and lasts your whole trip. Look before you book to save money.