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A travel eSIM gives you mobile data the moment you land, without hunting for a SIM shop or paying your carrier's roaming fees. You buy it online, scan a QR code, and you're connected. Here's how eSIMs work, when they're worth it, and how the best-known providers compare.
What is a travel eSIM?
An eSIM is a SIM card built into your phone. Instead of swapping a plastic card, you download a data plan from an app or a QR code. Your regular SIM stays in place, so you can keep your number for calls and texts while the eSIM handles mobile data abroad.
Most travel eSIMs are data-only. You get internet for maps, messaging apps, ride-hailing and calls over WhatsApp or FaceTime, but not a local phone number.
eSIM vs roaming vs local SIM card
| Option | Best for | Downsides |
|---|---|---|
| Travel eSIM | Most trips: set it up before you go and have data on arrival | Data-only in most cases; needs an unlocked, eSIM-compatible phone |
| Your carrier's roaming | Short trips when your plan includes the destination | Daily roaming passes add up quickly on longer trips |
| Local SIM card | Long stays when you need a local number | Finding a shop, ID checks, and swapping cards on arrival |
Before you buy: check your phone
- eSIM support: most recent iPhones, Google Pixels and Samsung Galaxy flagships support eSIM. Check your phone's settings for "Add eSIM" or look up your model.
- Unlocked: your phone must not be locked to your carrier. If you bought it on a contract, ask your carrier.
- Install before you leave: download the eSIM at home on Wi-Fi, and switch it on when you land.
How to choose the right eSIM plan
- Country, regional or global: a single-country plan is usually cheapest. If you're visiting several countries, a regional plan (Europe, Asia) saves you buying several eSIMs.
- Data amount: maps and messaging use little data; video calls, streaming and hotspot use a lot. For a week of normal use, a few gigabytes is often enough.
- Validity: make sure the plan lasts as long as your trip, and check when the clock starts (at installation or on first connection).
- Top-ups: it's easier to add data to the same eSIM than to install a new one.
- Hotspot: if you want to share data with a laptop or a travel partner, check that tethering is allowed.
Airalo vs Saily vs Yesim vs GigSky
All four sell data plans for most countries in the world through an app. Prices change often and vary by destination, so always compare the plan for your exact country and trip length.
Airalo
Airalo is one of the best-known travel eSIM brands, with plans for a very wide range of countries plus regional and global packages. It's a good default choice if you want lots of options and an app that's easy for first-timers.
Search your destination to see Airalo plans:
Saily
Saily comes from Nord Security, the company behind NordVPN. It focuses on a simple app with country, regional and global plans, and adds online security features inside the app. A good fit if you like the idea of one trusted brand handling both data and security.
Yesim
Yesim offers country and regional plans as well as unlimited-data options in many destinations, which suit heavy users and remote workers. It's worth checking if you'll be online a lot or staying longer.
GigSky
GigSky is one of the longest-running travel eSIM providers, with country, regional and global plans. It's a solid option to compare, especially for multi-country trips where a regional or global plan keeps things simple.
Which one should you pick?
- First eSIM, short trip: Airalo, for its wide choice and simple setup.
- You care about online security: Saily.
- You need a lot of data: look at Yesim's unlimited plans.
- Several countries in one trip: compare regional and global plans from GigSky and Airalo.
- Your phone doesn't support eSIM: a physical travel SIM such as Drimsim works in many countries.
Setting up your eSIM in 5 steps
- Buy the plan in the provider's app or website.
- At home, on Wi-Fi, install the eSIM from the app or by scanning the QR code.
- Label it ("Travel") so you can tell it apart from your main line.
- On arrival, switch the travel eSIM on for mobile data and turn data roaming on for that line only.
- Keep your main SIM on for calls and texts if you need them, but switch its data off to avoid roaming charges.
Common mistakes to avoid
- Deleting the eSIM after the trip if you might top it up later. You often can't reinstall it.
- Leaving data roaming on for your home SIM, which can lead to a surprise bill.
- Buying too little data for a long trip. Top-ups usually cost more per gigabyte than a bigger plan.
- Waiting until you land to install it, when you may not have Wi-Fi.
Planning the rest of the trip? Our trip planning checklist covers what to book and when, from flights to insurance and airport transfers.
Plans, prices and supported countries change often. Check the provider's website for the latest details for your destination and phone.