What is an eSIM?
An eSIM, short for embedded SIM, is a small chip soldered into your phone that does the job of a plastic SIM card. The e stands for embedded, not electronic.
Instead of visiting a shop and slotting in a card, you buy a plan online and install it by scanning a QR code. Within a minute or two, your phone is connected to a mobile network. The chip can store several plans at once, so you can keep your home number and add a travel plan without swapping anything.
That is the whole idea. No card to collect, no card to lose, and plans you can buy and switch in seconds.
How does an eSIM work?
The eSIM is a reprogrammable chip that follows the same global standard carriers already use. When you buy a plan, the carrier issues a profile, which is the digital version of everything a plastic SIM holds.
You install that profile by scanning a QR code. Your phone stores it, connects to the carrier's network, and from then on it behaves exactly like a SIM you slotted in. You can hold multiple profiles and choose which one handles calls and which one handles data.
eSIM vs a physical SIM
They do the same job. The difference is convenience, speed, and flexibility.
| eSIM | Physical SIM | |
|---|---|---|
| Buy and activate online | ||
| Ready in minutes | ||
| Hold several plans at once | ||
| Nothing to lose or damage | ||
| No shop visit abroad | ||
| Swap between phones by hand |
For travel and second lines, the eSIM wins on nearly every point. A physical SIM still makes sense if you move one line between devices often, or if your phone is older.
We go deeper in the dedicated eSIM vs physical SIM guide.
Does my phone support an eSIM?
Most flagship phones released since about 2018 support eSIM. Here is the quick reference.
| Brand | Supported from | Notes |
|---|---|---|
| Apple iPhone | iPhone XS and XR (2018) and newer | Every model since, including SE 2020 and later. |
| Samsung Galaxy | Galaxy S20 and newer | Recent S, Z Fold, Z Flip, and many A models. |
| Google Pixel | Pixel 3 and newer | Pixel 3 through the latest Pixel. |
| iPad | Cellular iPad Pro, Air, and Mini (2018) and newer | Cellular models only. |
The 20-second check
How to set up an eSIM, step by step
Setup takes about two minutes. Have Wi-Fi or a connection ready to install the profile.
- 1
Buy a plan
Buy an eSIM and open its QR code in your dashboard.
- 2
Open settings
Go to cellular or mobile plan settings and choose to add a plan.
- 3
Scan the QR
Scan the QR code to install the eSIM profile.
- 4
Turn it on
Enable the line, select it for data, and you are connected.
Can you have two SIMs at once?
Yes. Most eSIM phones support dual SIM, so you can run two numbers side by side. A common setup while traveling is to keep your home SIM for calls and texts and use a travel eSIM for data. You pick which line does what in settings, and you can switch any time.
Why an eSIM is great for travel
This is where eSIMs shine. You buy a plan for your destination before you leave, land, and turn it on. No hunting for a shop, no roaming bill, no swapping your home SIM out and risking losing it.
Because the chip holds several profiles, your home number keeps working for calls and texts while the travel eSIM handles data. When you get home, you turn the travel plan off.
How much data do you actually need?
Data plans are sold by the gigabyte, so it helps to know what an hour of each activity uses. These are typical figures.
| Activity | Data per hour |
|---|---|
| Maps and navigation | About 5 MB |
| Messaging and email | Under 5 MB |
| Browsing and social | 60 to 150 MB |
| Music streaming | 60 to 150 MB |
| Standard video | 250 to 500 MB |
| HD video streaming | 1 to 3 GB |
| Video calls | 500 MB to 1.5 GB |
Typical figures, updated September 2026.
Rule of thumb: for a week of normal travel use, mostly maps, messaging, and some browsing, 3 to 5 GB is a comfortable choice. Stream a lot of video and you will want more.
eSIM pros and cons
Why people switch
- Buy and activate online in minutes
- Hold several plans and numbers on one phone
- Nothing to lose, damage, or swap
- Perfect for travel, no roaming bills
Worth knowing
- Older phones do not support it
- Moving a profile between phones can be fiddly
- You need internet once to install the profile
Are eSIMs safe?
Yes. An eSIM is at least as secure as a physical SIM, and arguably safer, because it cannot be pulled out or swapped by someone who grabs your phone. The profile is stored on a protected chip.
Using mobile data over an eSIM is also safer than joining open public Wi-Fi in an airport or cafe, which is easy for others to snoop on. It is not a VPN, but it keeps you off risky shared networks.
How to buy an eSIM
You buy an eSIM online in a minute. Pick your destination, choose a plan size, pay, and the QR code appears for you to scan.
SimVala does this a little differently: we take crypto only, so there is no card and no ID to buy. You top up a balance with a coin you already hold, then buy any plan from it. See how paying with crypto works, or jump straight to the eSIM store.
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Quick glossary
- eSIM
- An embedded SIM chip in your phone that you program with a plan by scanning a QR code.
- Profile
- The digital plan a carrier issues, the eSIM equivalent of a plastic SIM's contents.
- Dual SIM
- Running two lines on one phone at once, for example a home SIM plus a travel eSIM.
- QR activation
- Installing an eSIM by scanning a QR code in your phone settings.