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Guide

How to install an eSIM: step-by-step for iPhone & Android

Updated March 2026 · 6 min read

Installing a travel eSIM takes 3–5 minutes. This guide walks you through the process on both iPhone and Android, from purchase to activation.

Before you start

  • Make sure your phone supports eSIM (check our list)
  • Your phone must be carrier-unlocked (contact your carrier if unsure)
  • Connect to Wi-Fi — you need internet to download the eSIM profile
  • Have your QR code ready — this comes from your eSIM provider after purchase (email or in-app)

Installing on iPhone

1Open Settings → Cellular

Go to Settings → Cellular → Add eSIM (or "Add Cellular Plan" on older iOS versions).

2Scan the QR code

Tap "Use QR Code" and point your camera at the QR code from your provider. The phone will detect and download the eSIM profile automatically.

3Label the plan

iOS will ask you to label the new line. Choose something like "Travel" or "Thailand eSIM" to keep things organized. You can always rename it later.

4Set your default lines

iOS will ask which line to use for cellular data, calls, and messages. Set the eSIM as your data line and keep your physical SIM for calls/SMS.

5Activate

Some eSIMs activate immediately. Others activate when you first connect to a local network at your destination. Check your provider's instructions.

Installing on Android (Samsung, Pixel, OnePlus)

1Open Settings → Connections → SIM manager

The exact path varies by manufacturer. On Samsung: Settings → Connections → SIM manager → Add eSIM. On Pixel: Settings → Network → SIMs → Add SIM.

2Scan QR code

Select "Scan QR code" and point your camera at the provider's QR code. The profile will download.

3Confirm and enable

Confirm the installation. Set the eSIM as your mobile data line while keeping your physical SIM for calls.

4Activate at destination

Turn on the eSIM when you land. Most plans start the validity countdown at first network connection.

Troubleshooting

QR code won't scan

Try manually entering the activation code instead. Your provider should include an "SM-DP+ Address" and "Activation Code" that you can type in if the QR scan fails. Also ensure you're connected to Wi-Fi.

"eSIM not supported" error

This usually means your phone is carrier-locked. Contact your carrier to request an unlock. Some carriers lock eSIM functionality even on otherwise unlocked phones.

No data after installation

Check that: (1) the eSIM line is enabled, (2) it's set as the cellular data line, (3) data roaming is turned ON for the eSIM line, and (4) you're within the plan's coverage area.

Can't receive calls/texts on home number

Make sure your physical SIM is still enabled for voice and messaging. On iPhone, check Settings → Cellular and confirm your home line is set for voice/SMS.

Pro tip: Install your eSIM 1–2 days before your trip while you're still on Wi-Fi at home. This way you can troubleshoot any issues without the stress of being at the airport. Most eSIMs don't start the validity countdown until first activation.
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Frequently asked questions

3-5 minutes. You scan a QR code in your phone settings, follow the prompts, and the eSIM profile installs automatically. You can do this at home before your trip.
Yes. You need an internet connection to download the eSIM profile. Install over Wi-Fi at home before traveling — don't wait until you arrive.
Yes, and you should. Most providers let you install the eSIM days or weeks early. The data plan activates only when you connect to a network in the destination country.
Check that your phone is carrier-unlocked, data roaming is enabled, and the eSIM line is turned on in settings. Restart your phone and toggle airplane mode. If issues persist, contact the eSIM provider's support.