What is an eSIM?
An eSIM is a SIM card built into your phone. Instead of swapping a plastic card, you download a plan, which makes it the easiest way to get mobile data abroad.
How an eSIM works
An eSIM (embedded SIM) is a small chip inside the phone that does the job of a SIM card. Mobile plans are downloaded to it as profiles, usually by scanning a QR code or tapping install in the provider's app.
Most eSIM phones can store several profiles, so you can add a travel eSIM and keep your regular SIM in the phone at the same time.
Why travellers use eSIMs
- You buy and install the plan before you leave, so you're online as soon as you land.
- No SIM shop at the airport and no ID registration at the counter.
- Your home number stays active for calls and texts while the eSIM handles data.
- A travel eSIM is usually much cheaper than your home carrier's roaming.
What to watch out for
- Your phone must support eSIM and be unlocked. See our guide on checking your phone.
- Most travel eSIMs are data only and don't come with a local phone number. Plans that also include calls and texts are marked "Calls + SMS included" on our comparison pages.
- Installing needs an internet connection, so install the eSIM at home on Wi-Fi.
- Check when the plan's validity starts: some providers start counting on installation, others when you first connect at your destination.
- An installed eSIM usually can't be moved to another phone. Check the provider's rules if you plan to switch phones.
How to install a travel eSIM
- Check that your phone supports eSIM and is unlocked.
- Buy a plan on the provider's site or app.
- At home on Wi-Fi, scan the QR code or tap install in the provider's app.
- When you arrive, switch the eSIM line on, turn on data roaming for that line and choose it for mobile data.
- Turn off data roaming on your home SIM so it can't run up roaming charges.