This guide is for iOS 26 and later. If you're not sure which version you have, check Settings → General → About → Software Version — on an earlier version, see Install on earlier iOS versions.
📝 Note: Your eSIM will not be named "SimSIM" on your device — it appears under a local network's name at your destination, which is normal. The eSIM you just installed always appears at the bottom of the line list. More details.
iOS 26 and later
1. Open My eSIMs in the app
In the SimSIM app, go to My eSIMs and open the plan you purchased. A plan that hasn't been installed yet is marked as ready to install. If you bought several plans, make sure you pick the one for your current destination.
2. Tap the install button
Tap Install eSIM. The app passes the profile straight to iOS — there's no QR code to scan and no codes to enter manually.
3. Approve adding the eSIM
Your iPhone will ask permission to add a new eSIM. Approve it and wait for installation to finish. This takes a few minutes, and you can keep using your phone meanwhile.
4. Choose "Data Only"
When asked what the line is for, choose Data Only. The new line then handles internet only, while your calls and messages continue through your regular number.
5. Finish the installation
Tap Done. The eSIM is now installed on your device.
6. Turn on the new line
Select the newly configured eSIM and turn the line on. Until you do, the line exists on the device but is inactive.
💡 Tip: The eSIM you just installed always appears at the bottom of the line list.
7. Confirm data roaming is enabled
Go back to the previous screen, tap the eSIM you just enabled, and confirm Data Roaming is on. This is the step most people miss — without it the eSIM is installed but you'll have no internet at your destination.
8. After you land — switch your data line
Once you arrive, go to Settings → Cellular → Cellular Data and select the eSIM you set up. From this point your browsing runs through the plan you purchased.
If something isn't working
The most common problem by far is data roaming being switched off on the new line. If you have no internet at your destination, check that first.
For more checks see Troubleshooting, confirm your model is on the compatible device list, or see installing on Android if you're setting up a different device.