What this guide covers
An eSIM is a digital SIM card built into your smartphone. It lets you connect to a local network abroad without swapping physical SIM cards. It's convenient, cheaper than roaming, and can be set up entirely online before you leave. This guide covers how to choose an eSIM, verify device compatibility, and activate it correctly.
Step 1. Check device compatibility
eSIM is supported on:
- iPhone: XS (2018) and newer
- Android: Most flagship Samsung Galaxy S20+, Google Pixel 3+, and many Huawei, Xiaomi, and other models
Make sure:
- Your phone is unlocked (not carrier-locked).
- eSIM is not blocked by your carrier — confirm with your current provider.
- The device supports the right frequency bands (LTE/5G) in your destination country.
On iPhone: Settings → General → About → "Available SIM" — if this line appears, eSIM is supported.
Step 2. Choose a provider and plan
The most popular eSIM providers for travelers:
- Airalo — largest aggregator, 200+ countries
- Holafly — unlimited data plans, popular in Europe and Latin America
- Maya Mobile / Ubigi — strong coverage in Asia
When comparing plans, look at:
- Validity period (typically 7, 14, or 30 days)
- Data allowance
- Voice calls and SMS support (many travel eSIMs are data-only)
- Price per GB
eSIMs for popular destinations are available on Marix.
Step 3. Buy and receive your QR code
After payment, the provider will send a QR code to your email or in-app. Save it or take a screenshot — you'll need it during installation.
Step 4. Install the eSIM
On iPhone:
- Settings → "Cellular" → "Add eSIM" → "Use QR Code".
- Point your camera at the QR code.
- Follow the on-screen instructions — the profile installs in 1–2 minutes.
On Android (Samsung):
- Settings → Connections → SIM card manager → "Add mobile plan".
- Choose "Scan QR code" and point your camera at it.
Important: install the eSIM while connected to Wi-Fi — downloading the profile requires an internet connection.
Step 5. Activate at the right time
Many eSIMs activate automatically when you connect to a network in the destination country. Some providers ask you to activate manually via their app. Check your provider's activation instructions in advance.
Tips and common mistakes
- Don't delete the eSIM by accident. Some eSIMs are single-use — if you delete the profile, you may lose access to the plan permanently.
- Keep your main SIM for calls. Most travel eSIMs are data-only. Keep your physical SIM active for calls, or use VoIP.
- Install before you leave. Set up the eSIM at home while you have reliable Wi-Fi — don't wait until you land.
FAQ
Can I use an eSIM and a physical SIM at the same time? Yes. Most modern smartphones support Dual SIM mode (physical + eSIM). You can receive calls on your home SIM and use mobile data on the eSIM simultaneously.
How long does the eSIM stay active after installation? It depends on the plan. Typically 7–30 days from first network connection or from activation, whichever the provider specifies.
What if the QR code doesn't scan? Try entering the activation code manually — providers always include it alongside the QR code. If that fails, contact the provider's support.
Buy travel eSIMs with instant code delivery at Marix. Multiple payment options available.