Before you start
Install over Wi-Fi, before you travel — some steps need an active internet connection. Not sure your device supports eSIM? Check the compatible devices list first.
Open Settings → Cellular (or Mobile Data)
On iOS 17 and earlier this may be labeled "Cellular"; on iOS 18+ it's "Mobile Data" in some regions. Either way, tap Add eSIM.
Tap "Use QR Code"
Point your camera at the QR code from your Airhoi confirmation email. If you're viewing the email on the same phone, take a screenshot first and use "Enter Details Manually" instead — a phone can't usually scan its own screen.
Confirm and label the plan
iOS will ask you to confirm. Give it a label like "Japan Trip" so it's easy to tell apart from your home line later.
Set cellular plan preferences
You'll be asked which line to use for Cellular Data — choose your new Airhoi eSIM. Keep Default Voice Line set to your home SIM so calls and texts still work as normal. Turn on Data Roaming for the Airhoi line.
You're set
The eSIM stays installed but inactive until your phone connects to a supported network at your destination — that's when your plan's validity period starts.
Open Settings → Network & Internet → SIMs
Menu wording varies by manufacturer: Samsung uses Connections → SIM manager; Pixel uses Network & internet → SIMs. Look for Add eSIM or Download a SIM instead?
Scan the QR code
Select Scan QR code from carrier and point the camera at the code in your Airhoi email. Viewing the email on the same device? Use the manual entry option below instead.
Let it download
This can take up to a minute. Keep Wi-Fi on and don't close the settings app while it downloads.
Set your data preference
Set the new eSIM as your preferred line for Mobile data, and keep your physical SIM active for calls and texts. Enable Roaming for the Airhoi eSIM.
You're set
Your plan activates automatically the first time you connect to a supported network abroad.
Can't scan a QR code?
Every Airhoi confirmation email also includes the SM-DP+ address and activation code as plain text — useful if your camera can't focus, or you're installing from the same device the email is on. Choose "Enter details manually" at the eSIM install step, and enter both values exactly as shown in your email.