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The app is the easiest way to install: one tap hands the eSIM to iOS, with nothing to scan or type. Do it at home before you travel, while you’re online.
Run through the four quick checks first if this is your first eSIM.
1

Open your plan

In the Roamly app, open the My eSIMs tab and tap your plan. When it’s ready to install, it’s marked Ready.
The Roamly app's tab bar with My eSIMs highlighted
The My eSIMs list with a plan marked Ready
2

Tap Install on this device

Under Your eSIM is ready, tap Install on this device.
The plan page with Install on this device highlighted
3

Tap Activate

iOS opens Settings and asks to activate your eSIM. Tap Activate. The message about sharing your EID with the service provider is normal: it’s how every eSIM is delivered to a phone.
iOS asking to activate your eSIM, with the Activate button
4

Follow the prompts

iOS asks a few questions. The answers that keep your normal number working as before:
  • Label — call it something you’ll recognise, like Travel or the country you’re visiting.
  • Default line — keep your normal SIM for calls and messages. Roamly is data-only.
  • Mobile data — keep your normal SIM for now. You’ll switch to Roamly when you land.
5

Switch the Roamly line off until you land

Once iOS confirms the eSIM is installed, open Settings → Mobile (older iPhones say Mobile Service or Mobile Data; some regions say Cellular), tap your Roamly line and turn Turn on this Line off. The plan won’t start until you turn it on and connect at your destination.
6

Turn off Data Roaming on your normal SIM

While you’re still at home: in Settings → Mobile, tap your normal SIM under SIMs (usually labelled Primary) and turn Data Roaming off. That’s the switch that stops your home carrier charging you overseas. If you won’t need calls or texts on your number while you’re away, you can turn that line off entirely instead; it comes back exactly as it was when you switch it on at home.
Settings → Mobile with the Primary SIM highlighted under SIMs
The Primary SIM's settings with the Data Roaming switch highlighted
Back in the app your plan now shows Installed on your device. That’s it until you fly.

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When you land

Three switches get you online: turn the Roamly line on, select it for mobile data, and turn on Data Roaming for that line only. Follow Just landed? How to activate your eSIM; the app shows the same steps on your plan page once the eSIM is installed.

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