How to Install an eSIM on iPhone: Step-by-Step Guide (2026)

Installing an eSIM on an iPhone takes about two minutes, and once you know the steps you'll never queue for a SIM card at an airport again. This guide walks you through adding, activating, and configuring a travel eSIM on your iPhone — plus fixes for the issues people hit most often.

Short version: buy your plan, get a QR code by email, then go to Settings → Cellular → Add eSIM, scan the code, and label the line for travel. That's it. Below is the detailed version.

Before you start: what you need

  • An eSIM-compatible iPhone (iPhone XS, XR, or newer).
  • A Wi-Fi connection (you install the eSIM before you travel, on your home Wi-Fi).
  • Your eSIM QR code. When you buy an EzSim data plan, it arrives by email within minutes.

Tip: install the eSIM before you leave home. It stays dormant and only activates when you arrive at your destination, so you're online the moment you land.

Step-by-step: install an eSIM on iPhone

  1. Open Settings and tap Cellular (or Mobile Service in some regions).
  2. Tap Add eSIM, then Use QR Code.
  3. Point your camera at the QR code from your EzSim email. If you're viewing the code on the same phone, tap Enter Details Manually and paste the activation details instead.
  4. Tap Continue, then Done when the plan is added.
  5. Label the line something clear like "Travel" so you can tell it apart from your main number.
  6. Choose your main SIM as the default for calls and texts, and set the Travel eSIM for cellular data.

When you arrive: turn it on

  1. Go to Settings → Cellular and select your Travel eSIM.
  2. Turn on Turn On This Line.
  3. Enable Data Roaming for the travel line (this is required — it lets the eSIM connect to the local network; you still won't pay roaming fees because the plan is prepaid local data).
  4. Under Cellular Data, make sure the travel eSIM is selected.

Within a minute or two you should see a local carrier name in your status bar and be connected.

Common problems and fixes

My eSIM QR code won't scan

Increase your screen brightness if scanning from another device, or use Enter Details Manually and paste the SM-DP+ address and activation code from your email.

No signal after landing

Confirm Data Roaming is on for the travel line, then toggle Airplane Mode on and off to force a network search. If it still won't connect, select the network manually in Settings → Cellular → [Travel line] → Network Selection.

"Cellular Plan Cannot Be Added"

This usually means the QR code was already installed once (each code works a single time) or your iPhone is carrier-locked. A locked iPhone can't use third-party eSIMs — contact your carrier to unlock it.

Frequently asked questions

Can I install an eSIM before I travel?

Yes, and you should. Install it at home on Wi-Fi; it activates automatically when you connect to a network at your destination.

Will an eSIM replace my normal SIM?

No. Your iPhone runs both at once. Keep your physical SIM (or primary eSIM) for calls and texts on your usual number, and use the travel eSIM for data.

Does installing an eSIM use my data allowance?

No. You install over Wi-Fi, and the plan's data only starts counting once the eSIM connects to a network at your destination.

Ready to go?

Pick your destination and you'll have a QR code in minutes. Browse EzSim eSIM plans by country, or if you're not sure whether your phone supports eSIM, start with our what-is-an-eSIM guide.