How to activate eSIM on iPhone and Android, and when to do it

How to activate eSIM on iPhone

Here's how to activate eSIM on iPhone in the shortest honest version: install the profile at home over Wi-Fi, then switch the line on and make it your data line when you land. Those are two separate jobs, and mixing them up is behind most of the "my eSIM won't work" messages providers get.

Apple's setup page gives several ways in. Which one you use depends on what your provider sent.

• QR code. Open the Camera app, point it at the code and tap the Cellular Plan Detected notification. On iOS 17.4 or later you can also touch and hold a QR code in an email or web page and choose Add eSIM, which saves hunting for a second screen.
• Provider link or app. On iOS 17.4 or later, tapping the provider's link brings up an Activate New eSIM prompt. Some providers do it inside their own app instead.
• Manual entry. Settings, Cellular (Mobile Data in the UK), Add Cellular Plan, Enter Details Manually. You type the SM-DP+ address and activation code from the order.

Then tap Continue and Add Cellular Plan, and enter a confirmation code only if the provider gave you one. Apple says the iPhone should be on Wi-Fi or a hotspot while you do this.

When you arrive, open Settings, Cellular. Turn the travel line on, set it under Cellular Data as the line for data, and switch on data roaming for that line if the provider tells you to. Leave your home line on for calls and texts, with its own data roaming off. That last step is the one people forget, and it's the one that saves money.

The phone has to be carrier-unlocked. Settings, General, About, Carrier Lock should read "No SIM Restrictions". Apple's travel page says a locked iPhone can't use local or worldwide prepaid plans.

Should you scan the QR code or use the app?

Use the app if your provider has one that installs directly. It's fewer steps and nothing to photograph. Airalo's app has a Start installation button; Holafly says its app can install and activate on iOS 17.4 or later with no QR scan at all.

Keep the QR code anyway. It's the fallback when an app install stalls, and it works on any iOS version. Two warnings, though. Holafly says most eSIMs "are single-use and cannot be re-downloaded without contacting support", so scanning the same code twice usually fails. And the QR code needs to be on a different screen from the phone scanning it: print it, or open it on a laptop. On iOS 17.4 and later, the touch-and-hold trick gets round that.

How to set up eSIM on Android

Menu names vary by maker. These are the two we checked against the manufacturers' own help pages.

Google Pixel. Settings, Network & internet, SIMs, Add SIM, then follow the eSIM setup. Google says Pixel 7 and later can hold a second eSIM profile if the carrier allows it.

Samsung Galaxy. Settings, Connections, SIM card manager, Add mobile plan, Add using QR code, then scan. Samsung advises being on Wi-Fi or mobile data before you start.

Activation on arrival is the same idea as on iPhone: turn the eSIM on, make it the mobile data line and enable data roaming for it. Holafly's Android steps put it in that order, through SIM Manager and then Mobile Networks.

Install before the trip, activate on arrival

Install a day or two before you leave. Activate when you land. That's the rule, and both big brands write it down.

Holafly says installation and activation "are two different steps", advises installing at home on stable Wi-Fi at least a day before travelling, and says a day-based plan starts once the phone connects to a local network at the destination. Its subscription plans are the exception: they start when you buy them.

Airalo is similar, with one caveat worth checking. Its help centre says most eSIMs activate when they first connect to a supported network at the destination, but some activate at installation, wherever you are. The package details show an Activation Policy. Read it before you install a week early, or you might burn days at home.

So, can you install an eSIM before travel? Yes, and you should. You need a reliable connection to download the profile, and the arrivals hall is the worst place to find one.

What is an eSIM QR code, and how do you get one?

It's a delivery label, not the service itself. The code carries the address your phone downloads the profile from, plus an activation code. You get it by buying a plan: the provider emails it or shows it in the app straight after payment. A "free eSIM QR code" with no plan behind it is just a code.

How to get an eSIM, then, comes down to two checks and a purchase. Check your phone is on the eSIM compatible phones list, check it's unlocked, then buy from a provider. The cheapest eSIM page ranks them by price per gigabyte, and what is an eSIM covers the basics.

When eSIM activation fails

Work down this list in order. The first item is Holafly's own top suspect; the rest take seconds each.

1. Data roaming off on the eSIM line. Holafly names this as the most common reason activation fails. Turn it on for the travel line only.
2. Wrong data line. Your phone is still using the home SIM for data. Change it under Cellular Data (iPhone) or the SIM manager (Android).
3. You haven't arrived yet. An installed plan often waits for the destination network. Showing "activating" at home can be normal.
4. Carrier lock. The error rarely says so. Check Carrier Lock in Settings.
5. No internet during install. The profile has to download in full. Retry on Wi-Fi.

What not to do: delete the eSIM. Apple's page on erasing an eSIM says deleting doesn't cancel the plan and offers no restore; you'd need a new eSIM from the provider. Holafly gives the same advice. Contact support first.

For brand-specific screens, see how to install an Airalo eSIM on iPhone and how to activate a Holafly eSIM. If it still refuses, our Airalo eSIM not working and Holafly eSIM not working pages follow each provider's own troubleshooting order. Moving a plan to a new handset is a different job, covered in how to transfer an eSIM.