How to set up an eSIM on iPhone, step by step

Every iPhone from the XS and XR (2018) onward supports eSIM, and US models from the iPhone 14 onward are eSIM-only. The install takes about two minutes on hotel-free home Wi-Fi. Here is the exact sequence.

Before you start

• Your iPhone must be carrier unlocked. Bought outright: it is. On a carrier contract: check with them first, five minutes on their app usually confirms it.
• Be on Wi-Fi. The eSIM downloads a small profile and your data line is about to change; Wi-Fi keeps it painless.
• Have the QR code from your provider open on a second screen (laptop, tablet, or a printout).

Installing the eSIM

1. Open Settings, Mobile Service (called Cellular in some regions), then tap Add eSIM.
2. Choose Use QR Code and point the camera at the code from your provider’s email.
3. iOS shows “Activate eSIM”. Confirm and wait; it usually takes under a minute.
4. When asked to label the line, pick something obvious like “Travel data”. Future you, juggling lines in an airport, will be grateful.
5. Newer iOS versions also offer activation by tapping the eSIM details in Mail directly, and some providers push the eSIM through their app without any QR code. All routes end in the same place.

The three settings that matter more than the install

1. Default line for calls and texts: your home number. You keep receiving bank codes and calls as normal.
2. Mobile data: the travel eSIM. Settings, Mobile Service, Mobile Data, select the travel line. Leave “Allow Mobile Data Switching” OFF, otherwise the phone can quietly hop back to your home line and bill you roaming.
3. Data roaming: ON for the travel line, OFF for your home line. On a travel eSIM roaming is normal and included. On your home line it is how the horror stories start.

When to do all this

Install at home, days before the flight if you like. Most travel eSIMs only start their validity clock when they first touch the destination network, so installing early costs nothing. Turn the travel line on when you land, watch the bars appear, and open Maps to confirm data flows. My timing guide covers the edge cases.

Quick answers

Can I have multiple eSIMs installed? Yes, modern iPhones store several profiles and can keep two lines active at once. Old trips’ eSIMs can sit installed but switched off.

Will my WhatsApp change? No. WhatsApp is tied to your registered number, not to which line does the data.

What if the QR code will not scan? Every provider also gives a manual code (SM-DP+ address and activation code). Choose “Enter Details Manually” at step 2 and type them in.

Something else went wrong? Run my eSIM not working checklist in order; it fixes nearly everything.

Once the eSIM is installed, the only decision left is the plan. My destination pages compare current prices across the major stores, checked monthly.