You’ve heard of eSIM but aren’t sure how it works? No worries. In 5 minutes you’ll know everything you need about this technology that’s changing travel connectivity.
What is an eSIM?
An eSIM (embedded SIM) is a virtual SIM built into your phone. Unlike the physical SIM you slide into a tray, the eSIM is a chip soldered to your smartphone’s motherboard.
Physical SIM vs eSIM
| Feature | Physical SIM | eSIM |
|---|---|---|
| Form | Small plastic card | Chip inside the phone |
| Setup | Insert by hand | Scan a QR code |
| Switching | Remove/insert | Enable/disable in 2 taps |
| Number | 1 per tray | Up to 8 profiles stored |
| Risk of loss | Yes | No |
| Activation | In store or by mail | Instant, remote |
How does it work in practice?
- You buy an eSIM plan online (2 minutes)
- You receive a QR code by email
- You scan that QR code with your phone
- The eSIM profile downloads and installs automatically
- You activate the plan when you need it
That’s it. No store, no card to insert, no waiting.
Why eSIM is perfect for travel
The roaming problem
When you travel outside the EU with your home plan, your operator charges you roaming (international use). Rates are often very high:
| Destination | Roaming cost/MB | 1 GB roaming | eSIM 1 GB |
|---|---|---|---|
| Japan | €5–10 | €5,000–10,000 | ~€5 |
| United States | €3–8 | €3,000–8,000 | ~€5 |
| Thailand | €5–10 | €5,000–10,000 | ~€3 |
| Turkey | €2–5 | €2,000–5,000 | ~€4 |
eSIM can save you 99% compared to international roaming.
The eSIM solution
With a travel eSIM, you use a local network in the country you’re visiting. Your phone connects like a local, at local prices. Your home SIM stays active for calls and SMS.
Dual SIM: keep your home number
That’s eSIM’s biggest advantage: Dual SIM. Your phone can use two lines at once:
- Line 1 (physical SIM): your home number → calls, SMS, WhatsApp
- Line 2 (eSIM): local data plan → internet
Result: you stay reachable on your usual number while browsing on a cheap local data plan.
How to set up Dual SIM
In your phone settings:
- Calls → physical SIM (your home number)
- SMS → physical SIM
- Mobile data → eSIM (travel plan)
- Roaming → On for the eSIM
Is my phone compatible?
Most recent smartphones (2019+) support eSIM.
Compatible iPhones
All iPhones since the XS (2018): XS, XR, 11, 12, 13, 14, 15, 16, SE (2nd and 3rd gen).
Compatible Android
- Samsung: Galaxy S20+, S21, S22, S23, S24, Z Fold, Z Flip
- Google Pixel: 3, 4, 5, 6, 7, 8, 9
- Xiaomi: 13, 14
- OnePlus: 8+
- And many more
Check my phone compatibility →
How much does an eSIM cost?
Prices depend on destination and data amount:
| Data | Typical price | Best for |
|---|---|---|
| 1 GB | €3–5 | Weekend, light use |
| 3 GB | €5–9 | 1 week, moderate use |
| 5 GB | €7–13 | 1–2 weeks, normal use |
| 10 GB | €10–18 | 2–3 weeks, social media |
| Unlimited | €19–47 | Streaming, remote work |
Compare prices by destination →
Common questions
Does eSIM replace my SIM card?
No. eSIM works alongside your physical SIM. You keep your number, plan, and calls. eSIM just adds an extra data line.
Do I lose my eSIM if I change phones?
Yes, the eSIM profile is tied to the device. If you change phones, you’ll need to reinstall the eSIM. Most providers let you scan the QR code again.
Does eSIM work without internet?
For installation, you need Wi‑Fi (to download the profile). Once installed, eSIM works like a normal SIM — it connects to the local mobile network.
Can I use eSIM for calls?
Most travel eSIMs are data only. For calls, use WhatsApp, FaceTime, or your home SIM. Some providers offer plans with voice.
Is eSIM secure?
More secure than a physical SIM. eSIM can’t be removed, so it’s protected from theft. It can also be disabled remotely.
Next steps
Now that you know how eSIM works:
- Check your phone compatibility →
- Compare plans for your destination →
- Read our step-by-step activation guide →
See our best eSIM provider comparison →
Last updated: February 2026.
Developer and digital nomad, I lived between Canada and the United States before continuing to explore the world. After struggling with internet connectivity abroad one too many times, I created eSIM Planet to compare plans clearly and honestly. Every article is carefully written and reviewed to save you time and money.
