How to install an eSIM on iPhone: a step-by-step guide
Installing an eSIM on an iPhone takes a few minutes and no SIM tray, no paperclip, and no trip to a phone shop. You buy a plan, scan a QR code or tap to install through the app, and set it as your travel data line. This guide walks through the whole process, plus the common snags and how to clear them, so you land connected on your next trip.
An eSIM is a digital SIM built into your phone, so you can add a travel data plan alongside your usual number. If the idea is new to you, our explainer on what an eSIM is covers the fundamentals before you start.
Before you start
Two quick checks save almost all of the frustration people run into.
First, confirm your iPhone supports eSIM. Most iPhone XR, XS, and later models sold outside mainland China support eSIM. To check directly, open Settings, tap General, then About, and scroll to look for an availability or EID entry under SIM. If you see it, you are good to go.
Second, make sure your iPhone is carrier unlocked. A phone locked to a single network may refuse a new eSIM. You can check in Settings, General, About, beside the Carrier Lock line, which should read No SIM restrictions. Our connectivity checklist lists these pre-trip checks alongside everything else to sort before you fly.
Do the installation while you still have reliable Wi-Fi at home. You can install before you travel and switch the plan on once you arrive.
Step by step: installing your eSIM
After you buy an eSIM plan, your provider gives you either a QR code or an in-app install option. Here is the QR code route, which is the most common.
- Open Settings on your iPhone, then tap Mobile Service or Cellular, depending on your iOS version.
- Tap Add eSIM, then Use QR Code.
- Point the camera at the QR code from your provider. If you are reading the code on the same phone, choose the option to enter details manually or open the link your provider supplied.
- Tap Continue when the plan is detected, and wait for the eSIM to activate.
- Label the plan with something clear, such as Travel, so you can tell it apart from your home line.
If your provider supports direct installation through its app, the flow is even shorter: you tap a button in the app and iOS adds the eSIM for you. Either way, the plan now lives on your phone ready to use.
Activating and setting your eSIM as the data line
Adding an eSIM does not automatically route your data through it, so finish the setup once you arrive.
In Settings, under Mobile Service or Cellular, choose your travel eSIM for Mobile Data. Turn Data Roaming on for that plan, which the eSIM needs to connect to its partner networks abroad, and leave your home line set to mobile data off to avoid unexpected home-network charges. Keep your home number active for calls and texts if you want, while data flows over the eSIM.
Give it a minute to register on a local network after you land. If nothing happens, a quick restart usually nudges it into life.
Common issues and fixes
- The eSIM will not activate. Confirm you are on Wi-Fi or a working connection, then retry. A QR code can only be installed once, so if it fails repeatedly, contact your provider for a fresh code.
- No data after landing. Check that the travel eSIM is selected for Mobile Data and that Data Roaming is on for that line specifically.
- Carrier lock message. Your iPhone may be locked to a network. Ask your home carrier to unlock it before you travel.
- Slow or no signal. Toggle Airplane Mode on and off, or restart the phone, to force it to search for a network again.
- Two lines confusion. Label each line clearly and check which one is set as default for data, calls, and messages in your mobile settings.
Getting an eSIM for your trip
If you have not bought a plan yet, Saily offers eSIM data plans for destinations around the world, so you can install before you leave and switch on when you land. You can get a Saily eSIM here and have it ready in minutes. To weigh up plan types before you buy, our guide to local, regional, and global eSIMs explains which suits different kinds of trips.
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Frequently asked questions
Which iPhones support eSIM?
Most iPhone XR, XS, and newer models sold outside mainland China support eSIM. Check in Settings, General, About, where an EID or SIM availability entry confirms support.
Can I use an eSIM and my normal SIM at the same time?
Yes. iPhones with eSIM support dual SIM, so you can keep your home number active for calls and texts while routing data through the travel eSIM.
Do I need Wi-Fi to install an eSIM?
You need a working connection to install and activate, so do it on home Wi-Fi before you travel. Once installed, the eSIM connects to local networks when you arrive.
Will installing an eSIM delete my normal SIM?
No. An eSIM is added as a separate line. Your physical SIM or existing eSIM stays in place, and you choose which line handles data, calls, and texts.
Why is my eSIM not getting data abroad?
The most common cause is that Data Roaming is off for the eSIM line, or your home line is still set as the data line. Select the travel eSIM for Mobile Data and turn Data Roaming on for it.
Can I reinstall an eSIM if I delete it?
Most QR codes work only once, so deleting an eSIM can mean you cannot reinstall it from the same code. Contact your provider, who can usually reissue the plan.
Do I install the eSIM before or after I travel?
Install it before you travel while you have reliable Wi-Fi, then switch it on for data once you land. This avoids relying on finding connectivity at the airport.
How do I avoid charges from my home network?
Set your home line's mobile data to off and use the travel eSIM for data only. Keep your home number for calls and texts if you wish, but check your provider's roaming terms first.