How to Set Up an eSIM on iPhone: One-Tap & QR

Every iPhone since the XR supports eSIM, and Apple has quietly made installation better each year — modern iPhones can now install a travel eSIM with a single tap, no QR code involved. Here's the full setup, from purchase to landing, including the settings Apple hides two menus deep.

Before you start

iPhone XR or newer (2018+). All iPhone 11/12/13/14/15/16 models qualify; US-sold iPhone 14 and later are eSIM-only and obviously qualify.
Carrier-unlocked. Check Settings → General → About → Carrier Lock — it should say "No SIM restrictions". If it names your carrier, request an unlock before traveling.
Wi-Fi connection for the install.

Method 1: one-tap install (iOS 17.4 and later)

If your iPhone runs iOS 17.4 or newer (released spring 2024 — check Settings → General → Software Update), the AeroCell app can install your eSIM directly:

Buy your plan in the app.
Tap the install button on your eSIM.
iOS opens its native eSIM setup — confirm, and the profile downloads and installs.

No camera, no second screen, done in under a minute. This uses Apple's universal-link install flow, the same mechanism carriers use.

Method 2: QR code

On older iOS versions, or if you bought on the website:

Open the confirmation email on another screen (laptop, tablet — you can't scan your own phone's display).
On the iPhone: Settings → Cellular (or Mobile Service) → Add eSIM → Use QR Code.
Scan, confirm, wait for "Cellular Setup Complete".

No second screen handy? Add eSIM → Enter Details Manually and paste the SM-DP+ address and activation code from the same email.

The post-install settings (do this right away)

iOS will ask a few questions during setup; here's how to answer for a travel eSIM:

Label the line "Travel" or the destination name — future you will thank you.
Default line (calls/iMessage): keep your primary SIM, so your number stays reachable.
Cellular Data: you'll switch this to the travel eSIM when you land (or now — it does nothing until it connects abroad).
Cellular Data Switching: OFF. This is the sneaky one — Settings → Cellular → Cellular Data → Allow Cellular Data Switching. Leave it on and iOS may silently route data through your home SIM at roaming rates.

On landing: three taps

Settings → Cellular → tap your travel eSIM → Turn On This Line.
Same screen → Data Roaming ON (for the eSIM only — this is normal and doesn't cost extra; why).
Settings → Cellular → Cellular Data → select the travel eSIM.

Your iPhone should register on the local network within a minute or two. iMessage and WhatsApp keep working with your own number; your home SIM keeps ringing for calls.

Frequently asked questions

How do I check my eSIM's data usage?

The AeroCell app and your dashboard show live plan usage. iOS's own counter (Settings → Cellular) helps, but reset dates make it unreliable — trust the app.

Can I store multiple travel eSIMs?

Yes — iPhones store eight or more eSIM profiles (two active at once). Keep old trips' profiles or pre-install the next destination; only the active, connected plan consumes validity.

Do I lose iMessage or FaceTime on my normal number?

No. Keep your primary SIM as the default for iMessage/FaceTime during setup and everything continues as usual, now over the eSIM's data.

It says "Cellular Plan Cannot Be Added"?

Usually a lock or a re-scan of an already-installed code. Run through the troubleshooting guide — and never delete the eSIM to retry; profiles generally install once.

My iPhone is eSIM-only (US iPhone 14+). Anything different?

Nothing — you're already living the eSIM life. Your home plan is an eSIM too; the travel eSIM installs alongside it exactly as above.

Get your plan

Browse destinations, buy, tap install, and board with data waiting at the other end. On Android too? Here's the Android walkthrough.