Landing in a new country and having mobile data the moment the plane touches down used to mean expensive roaming or a hunt for a local SIM card shop. An eSIM for travelling abroad changes that. You buy a data plan online, install it in a couple of minutes and you are connected wherever you go. Here is how eSIMs work, why so many travellers now use them and how to choose the right one for your trip.
What is an eSIM?
An eSIM is an embedded SIM – a tiny chip built into your phone that does the job of a traditional SIM card. Instead of inserting a physical card, you download a digital “profile” from a mobile provider, usually by scanning a QR code or through an app. Most modern phones can store several eSIM profiles, so you can keep your home number active and add a separate data plan for your trip.
The advantages for travellers
- Instant connection: install the eSIM before you leave and switch it on when you land – no queues at airport phone shops.
- Keep your home number: use your regular SIM for calls and texts, and the eSIM for data.
- Lower costs: travel eSIM plans are usually much cheaper than roaming packages from your home provider.
- Flexibility: choose a plan for a single country, a region such as Europe, or a global package for multi-country trips.
- Nothing to lose: there is no tiny plastic card to misplace when swapping SIMs.
Are there any downsides?
- Not every phone supports it: older or budget models may not have eSIM capability.
- Locked phones: if your phone is locked to your home carrier, you will not be able to add another provider’s eSIM.
- Data only: many travel eSIMs include data but no local phone number, though some plans include calls.
How to start using an eSIM abroad
- Check your phone: confirm that your device supports eSIM and is unlocked. On most phones you will find the option under mobile or cellular settings.
- Choose a plan: compare providers by coverage in your destination, data allowance, validity period and price.
- Install before you fly: scan the QR code or use the provider’s app while you still have Wi-Fi at home.
- Activate on arrival: switch on the eSIM line and data roaming for it when you land, and set it as your mobile data line.
Tips for using an eSIM overseas
- Turn off roaming on your home line to avoid unexpected charges from your regular provider.
- Estimate your data needs: maps, messaging and social media use far less data than video streaming.
- Check validity: a plan’s clock may start when you install it, not when you land – read the terms.
- Stay safe online: protect your personal information, and use your eSIM data rather than open public Wi-Fi for banking.
Frequently asked questions
Can I use WhatsApp with a travel eSIM?
Yes. WhatsApp stays linked to your regular phone number, so you can keep chatting and calling over data as usual.
Can I keep my regular SIM active at the same time?
Yes. Phones that support dual SIM let you keep your home number for calls and texts while using the eSIM for data.
Choosing the right eSIM
An eSIM is a smart, simple way to stay connected on holiday while keeping full control over your costs. To compare specific providers, see our guide to affordable eSIM options for international travel, and if you are still weighing up the alternatives, read local SIM, international SIM or your home data plan.
