What is an eSIM? A simple guide for travellers
An eSIM is a SIM card that lives inside your phone instead of on a piece of plastic. It does the same job as a normal SIM: it connects you to a mobile network so you can use data. The difference is that you download it instead of slotting it in.
For travellers, that changes a lot. You can buy data for your next trip from your sofa, install it before you leave, and switch it on when you land.
How an eSIM works
Every modern smartphone with eSIM support has a small chip built in. When you buy an eSIM plan, you get a QR code (or a one-tap install link). Your phone reads it, downloads the plan's profile and adds a new line to your settings.
That new line sits next to your normal SIM. You choose which one handles mobile data. Most travellers keep their home SIM on for calls and texts, and use the eSIM for data.
Why travellers use eSIMs
- No hunting for a SIM shop. You arrive with data already set up.
- No roaming surprises. You pay a fixed price for a set amount of data, up front.
- Keep your number. Your home SIM stays in the phone, so you can still get calls and SMS codes from your bank.
- Nothing to lose. There is no tiny card to swap or misplace.
- Many countries, one app. Going on to a second country? Add another plan in minutes.
eSIM vs physical SIM
A physical SIM is tied to the card. To change networks you need a new card, which usually means finding a shop and showing ID. An eSIM is tied to a profile you can download, so you can change plans from anywhere with Wi-Fi.
You can store several eSIM profiles on one phone, but usually only one or two are active at the same time.
Does my phone support eSIM?
Most phones released since 2018 do, including recent iPhones, Google Pixels and Samsung Galaxy models. The phone also needs to be carrier-unlocked, which means it is not locked to your home network.
The quickest way to know for sure is our compatibility checker.
How to get started
- Check your phone supports eSIM.
- Pick a plan for your destination on SimOrbit.
- Install the eSIM on Wi-Fi before you travel.
- When you land, switch the eSIM on and turn on data roaming for it.
That's it. You're online the moment the wheels touch down.