What Is an eSIM? The Complete Beginner's Guide
An eSIM is a digital SIM card built into your phone — no plastic, no queues, instant connectivity. Learn how it works and why travellers are switching.
An eSIM is a digital SIM card embedded directly into your phone's hardware. Instead of popping in a small plastic card, you download a data plan over the internet, scan a QR code, and you're connected — all in under two minutes.
eSIM technology has been in smartphones since 2018 and is now standard on all modern iPhones, Samsung Galaxy devices, Google Pixel phones, and hundreds of other handsets. If you have a phone made in the last three to four years, there's a very good chance it already supports eSIM.
What is an eSIM?
eSIM stands for Embedded Subscriber Identity Module. The 'embedded' part is key — unlike a traditional SIM, it cannot be removed or swapped. It's soldered onto the phone's circuit board at the factory.
What makes it powerful is that it's reprogrammable. A single eSIM chip can hold multiple mobile plans from different carriers around the world. You switch between them in your phone settings — no physical swapping required.
Quick fact
Apple removed the physical SIM card slot entirely from US models of the iPhone 15, iPhone 15 Pro, and later devices. eSIM is now the only option on these phones.
How does an eSIM work?
The process is straightforward and takes just a couple of minutes from start to finish:
Purchase a plan
Choose your destination and data package. You'll receive a QR code by email instantly after checkout.
Scan the QR code
Open your phone's eSIM settings and scan the code. On iPhone: Settings → Cellular → Add eSIM. On Android: Settings → Connections → SIM Manager → Add plan.
Activate at your destination
Your plan activates automatically the first time your phone connects to a local network at your destination. No action needed.
Stay connected
Browse, stream, and navigate at local 4G/5G speeds. No roaming charges, no bill shock.
The entire setup happens while you're still at home with Wi-Fi. By the time you land, your phone is ready to go.
eSIM vs physical SIM
Both connect you to a mobile network, but the experience is very different — especially when you're travelling.
| Feature | eSIM | Physical SIM |
|---|---|---|
| Setup | Download online, 2 minutes | Buy in-store, queue at airport |
| Available before you travel | Yes | No |
| Risk of losing it | None | Yes |
| Works while abroad | Yes | Depends on roaming plan |
| Keep your home number | Yes (dual SIM) | Not always |
| Multiple plans on one phone | Yes | One at a time |
| Cost for travel data | From $1.99 | Often $5–$15+ per day roaming |
Benefits for travellers
eSIM was designed for exactly this use case. Here's why frequent travellers are switching:
- No airport SIM hunt — your plan is ready before you take off
- Zero bill shock — prepaid data means you set the limit upfront
- Keep your home number active for calls and texts while using eSIM for data
- Switch destinations in seconds — buy a plan for your next country before your flight lands
- 190+ destinations covered with a single provider
- Works on any unlocked eSIM-compatible device
Ready to try eSIM?
Find a plan for your destination in seconds. From $1.99, no subscription required.
How to get started
Getting your first eSIM with Vyroam takes three steps. First, check that your phone is compatible — most modern smartphones are, and you can verify on our compatibility page. Second, search for your destination and pick a data plan that fits the length of your trip. Third, complete checkout and install the QR code before you travel.
There's no account required to purchase, though creating one lets you access your order history, manage multiple eSIMs, and earn 10% Travel Credit on every purchase to use on future trips.
Pro tip
Install the eSIM at home over Wi-Fi, not at the airport. Your phone will be ready the moment you land — no hunting for a signal or a queue for a local SIM.