How to install and activate an eSIM on iPhone

This works on iPhone XS, XR, SE (2020) and later, running a recent version of iOS. Do the install at home on Wi‑Fi a day or two before you fly.

Which iPhones support eSIM

Every iPhone from the XS and XR (2018) onward has eSIM hardware, including all SE, 11, 12, 13, 14, 15 and 16 series models. Two things to check beyond that:

• US models of iPhone 14 and later are eSIM-only — there’s no physical SIM tray at all, which actually makes travel eSIMs simpler since you’re not juggling a tray.
• Storage limit: an iPhone can hold up to 8 downloaded eSIM profiles, but only one or two active at a time (one eSIM + one physical SIM, or two eSIMs on eSIM-only models). If you travel often, delete old trip profiles occasionally rather than letting them pile up.

1. Check your iPhone is unlocked

Settings → General → About → look for Carrier Lock. It should say “No SIM restrictions”. If it says anything else, contact your home carrier before buying an eSIM — a carrier lock blocks any other network’s eSIM, not just physical SIMs from competitors.

2. Install the eSIM profile

With a QR code (from the provider’s confirmation email):

1. Settings → Cellular (or Mobile Service) → Add eSIM.
2. Choose Use QR Code and scan it. If you’re reading the email on the same phone, choose the option to enter details manually or open the provider’s app instead.
3. When prompted, label the plan — e.g. “Japan trip”.

With the provider’s app: many providers (Airalo, Saily, Nomad, aloSIM) can install the eSIM directly. Install the app, buy or open your plan, and tap Install eSIM — it hands the profile to iOS for you. This is the easier route if you’re installing on the same phone you’ll travel with, since there’s no QR code to photograph from another screen.

3. Set your lines up correctly

After install, iOS asks how to use each line. Set:

• Default Line / Voice: your home SIM (keeps your number for calls and 2FA).
• Cellular Data: the travel eSIM.
• Turn OFF “Allow Cellular Data Switching” so your iPhone can’t fall back to your home SIM’s expensive roaming.

4. On arrival: turn on roaming for the travel eSIM

1. Settings → Cellular → tap the travel eSIM.
2. Turn on Turn On This Line.
3. Turn on Data Roaming (this is required — the eSIM’s “home” network is abroad, so it’s technically always roaming). It only affects this line.
4. Make sure Cellular Data is set to the travel eSIM.

Give it a minute to find a network. If nothing happens, toggle Airplane Mode on and off, or restart.

5. When the plan ends

Top up in the provider’s app if supported, or remove the profile: Settings → Cellular → tap the eSIM → Delete eSIM. Deleting it frees a slot for your next trip.

Common problems

• No signal after landing: Data Roaming is off, or the wrong line is set for Cellular Data.
• Can’t scan the QR code: it’s on the screen you’re scanning with. Use the app, or open the email on a laptop.
• Messages/iMessage not sending: set iMessage and FaceTime to use your home number under Settings → Messages → Send & Receive.
• “Cellular Plan Not Available” error: usually a temporary issue on the provider’s side after a fresh install — wait a few minutes and toggle the line off and on before contacting support.
• QR code says “already used”: each QR code installs once. If you reinstalled iOS or reset network settings before your first activation, contact the provider for a fresh code rather than rescanning the same one.

FAQ

Can I install an eSIM without Wi‑Fi? You can install over cellular data if you have some available, but not with zero connectivity — the phone needs to reach the provider’s server to download the profile. This is exactly why the advice is to install before you fly, while you still have home Wi‑Fi.

I’m switching to a new iPhone — can I move my eSIM to it? Some providers support eSIM transfer between your own devices (look for “Transfer eSIM” in Settings → Cellular on the old phone, or a transfer option in the provider’s app); others require you to buy a new plan for the new device, since the profile is tied to the phone it was installed on. Check before you wipe the old phone.

Do I need a new eSIM for every trip, or can I reuse one? If you’re returning to a country where you still have an installed (even expired) profile, most providers let you top up the same eSIM rather than installing a new QR code. Check the provider’s app first — it’s faster than a fresh install.

See also: installing on Android, how much data to buy, and what an eSIM actually is if you’re starting from scratch.