If you've bought a new phone recently, you may have heard about eSIMs — and wondered what they actually are. The good news: they make staying connected simpler than ever, especially when you travel. Here's everything explained in plain English.
In short: An eSIM (embedded SIM) is a digital SIM card built right into your device. It does exactly the same job as a traditional plastic SIM — connecting you to a mobile network — but instead of inserting a card, you simply download your plan online. No card, no store visit, no waiting.
How does an eSIM work?
It replaces the plastic card with a reprogrammable chip already inside your phone.
A chip already inside your phone
Instead of a removable plastic card, an eSIM is a tiny chip (called an eUICC) built into your device at the factory. It does everything a physical SIM does — it just never needs to be inserted or swapped.
You download a plan, not a card
When you buy a plan, you receive a digital profile instead of a card. You add it by scanning a QR code or tapping an install link, and your phone is connected in a couple of minutes.
Store many plans, switch in seconds
Your eSIM chip can hold several profiles at once. You can keep your home number active and switch to a travel data plan whenever you need — all from your settings, with no physical swapping.
eSIM vs physical SIM
How the two compare at a glance.
| Feature | eSIM | Physical SIM |
|---|---|---|
| Format | Digital — built into your device | Physical plastic card |
| Getting connected | Instant — buy and install online in minutes | Buy in a store or wait for delivery |
| Switching plans or carriers | Switch in seconds; store multiple profiles | Physically swap the card each time |
| Travelling abroad | Add a local/travel plan without removing your home SIM | Buy a local SIM or pay roaming fees |
| Using two numbers | Run two or more lines on one phone | One card per SIM slot |
| Risk of loss or damage | Can't be lost, damaged or removed | Can be lost, damaged or stolen |
| Security if your phone is stolen | A thief can't pull it out to dodge tracking | Can be removed from the device |
| Environmental impact | No plastic, packaging or shipping | Plastic card, packaging and delivery |
| Device support | Newer phones from ~2018 onward | Works in almost every phone ever made |
Why choose an eSIM?
The benefits that are winning over travellers and everyday users alike.
Instant activation
No store visit, no waiting for the post. Buy online and be connected in minutes.
Made for travel
Land in a new country and get online straight away with an affordable local data plan.
Two numbers, one phone
Keep your home number for calls and texts while using the eSIM for data.
Nothing to lose
There's no card to misplace, damage or have removed from your device.
Better for the planet
No plastic cards, packaging or shipping — eSIM is the greener way to connect.
Avoid roaming bills
Skip expensive carrier roaming with a low-cost data plan for your destination.
- It only works on newer, eSIM-compatible devices — older phones and some regional variants don't support it.
- You need an internet connection (usually Wi-Fi) to download the profile the first time.
- Moving an eSIM to a new phone can be less straightforward than simply popping out a card.
- Not every mobile carrier offers eSIM yet, though support is growing quickly worldwide.
How to get started with an eSIM
Three simple steps to get connected.
Check your device
Make sure your phone, tablet or watch supports eSIM and is carrier-unlocked.
See compatible devicesChoose a plan
Pick an affordable data plan for your destination from over 200 countries and regions.
Browse data plansInstall & activate
Scan the QR code, follow a few simple steps, and connect the moment you arrive.
How to installeSIM basics — frequently asked questions
Quick answers to the most common questions about eSIMs.
eSIM stands for "embedded SIM". It is a SIM card built directly into your device as a small chip, so there is no plastic card to insert. It performs exactly the same job as a traditional SIM — identifying you on a mobile network — but it is programmed digitally.
For most people, yes — especially for travel. An eSIM activates instantly, lets you store several plans at once, can't be lost or damaged, and makes switching between your home number and a travel plan effortless. The main advantage of a physical SIM is that it works in almost any phone, including older models that don't support eSIM.
Yes. A travel/data eSIM is added as a separate line, so your existing number and physical SIM keep working as normal. You simply use the eSIM for mobile data while keeping your home number active for calls and texts.
No. eSIM is available on most phones released from around 2018 onward — such as the iPhone XR/XS and later, Samsung Galaxy S20 and later, and Google Pixel 3 and later — but not on older devices. Some regional variants also lack eSIM. You can check your exact model on our compatible devices page.
Yes. An eSIM is at least as secure as a physical SIM, and arguably more so — because it can't be physically removed from your phone, a thief can't take it out to avoid tracking or to use your line in another device.
Yes. Your phone can store multiple eSIM profiles and let you switch between them in your settings. Recent iPhones (13 series and newer) can even keep two eSIMs active at the same time, on top of your physical SIM.
Ready to try an eSIM?
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