How do I install a travel eSIM on an iPhone?
What do I need first?
An iPhone XS, XS Max, XR or later that is not locked to a carrier, and Wi-Fi. Apple notes that iPhones sold in China mainland do not support eSIM, except iPhone 18 Pro, 18 Pro Max, iPhone Duo, iPhone 17e and iPhone Air.
What are the steps?
Check the phone
Settings > General > About. "No SIM restrictions" next to Carrier Lock means the iPhone is not locked to a carrier.
Get on Wi-Fi
Install while you still have a stable connection, ideally the day before you fly.
Scan the QR code
Open Camera and scan it, then tap Cellular Plan Detected. On iOS 17.4 or later you can also touch and hold a QR code in Mail or a browser and tap Add eSIM, or tap the provider's setup link.
Add the plan
Tap Continue, then Add Cellular Plan. Give it a label such as "Travel".
Pick lines
Keep your home line as the default for calls and iMessage; choose the travel line for Cellular Data.
On arrival
Turn on Data Roaming for the travel line only. Leave it off on your home line to avoid roaming charges.
What if there is no QR code?
Settings > Cellular (or Mobile Data) > Add Cellular Plan > Enter Details Manually, then type the SM-DP+ address and activation code from the provider's email.
Will installing early start the clock?
Usually not, but it depends on the plan. See when to install a travel eSIM; Holafly notes that iOS 16.4 and later can combine installation and activation on its plans.
Questions
Where is the Add eSIM option on iPhone?
Settings > Cellular (Mobile Data in some regions) > Add eSIM or Add Cellular Plan.
Do I need data roaming on?
Yes, for the travel eSIM line. Its network is a "roaming" network as far as the phone is concerned. Keep roaming off on your home line.