Can I activate my eSIM while in airplane mode?

Yes. Kind of. You can install an eSIM in airplane mode as long as you're connected to Wi-Fi. The QR code scan, profile download, and line setup all work with cellular off. What you can't do in airplane mode is the actual activation. The first connection to a partner network that starts the plan timer. That step requires cellular radio enabled. So the typical pattern is: install in airplane mode on the plane (over inflight Wi-Fi if available), then take airplane mode off when you land to activate.

Below: what works in airplane mode vs what doesn't, how to use the flight time productively, and why activation can't happen until you land.

What "airplane mode" actually does

Airplane mode is a single toggle that disables all wireless radios on your phone: cellular, Wi-Fi, and Bluetooth. After flipping the toggle, you can re-enable Wi-Fi and Bluetooth individually while keeping cellular off. Most people do this in-flight when the airline allows Wi-Fi.

So when we say "in airplane mode," we mean cellular is off, Wi-Fi may or may not be on. For eSIM setup purposes:

• Cellular off, Wi-Fi on: install works, activation doesn't.
• Cellular off, Wi-Fi off: nothing works (no internet for the install).
• Cellular on, Wi-Fi off: install and activation both work (but you wouldn't want to use cellular data to install when home Wi-Fi was free).
• Cellular on, Wi-Fi on: standard everyday mode; install and activation both work.

The key insight is: install requires internet (any internet); activation requires cellular radio enabled.

What you can do in airplane mode + Wi-Fi

The install steps that work with cellular off:

• Scan the QR code from your activation email
• Tap the install link if your iPhone supports one-tap install
• Watch the eSIM profile download from the activation server (uses Wi-Fi)
• Name the line ("Eflexsim Italy")
• Configure default voice line, data line, and other settings
• Verify the line appears in Cellular settings

After all of that, the eSIM is installed and configured. It's sitting on your phone's chip, ready to use. The plan timer hasn't started yet because the eSIM hasn't connected to any cellular tower.

What you can't do in airplane mode

The actions that require cellular radio on:

• The eSIM's first connection to a partner network (activation)
• Verifying signal strength on the Eflexsim line
• Testing whether data actually flows through the eSIM
• Receiving SMS or making calls (though most travel eSIMs are data-only anyway)

These all wait until you turn airplane mode off. Usually when you land.

The flight-day flow

A common pattern for travelers who didn't get a chance to install at home:

On the plane:

1. Connect to inflight Wi-Fi (if available). Pay or use a free tier for basic browsing.
2. Open your activation email.
3. Follow the iPhone or Android install flow. Profile downloads over Wi-Fi.
4. Name the line, configure default voice line as your home line, set data line preference to Eflexsim.
5. Verify the eSIM line shows up in Cellular settings.
6. Toggle the Eflexsim line off and toggle Data Roaming off. You don't want it to connect to anything until you land.

At the gate after landing:

1. Turn off airplane mode (Wi-Fi turns off too. That's fine).
2. Toggle the Eflexsim line on.
3. Turn on Data Roaming for the Eflexsim line.
4. Set Cellular Data to Eflexsim.
5. Eflexsim activates on first network registration. Timer starts.

Total flight time used: maybe 5 minutes during cruise. Total post-landing time: 2 minutes. The eSIM is fully operational by the time you reach baggage claim.

What about flights without Wi-Fi?

Same idea, just delayed. You can't install on the plane without internet. Wait until you're at the destination airport. Most airports have free Wi-Fi (sometimes requiring email registration). Connect to that, then install.

The delay between landing and having Eflexsim active goes from 2 minutes (if you installed before the flight) to maybe 8-10 minutes (install on airport Wi-Fi after landing). Still fast; just less ideal than pre-flight install.

Why activation can't happen in airplane mode

Activation is by definition a connection to a cellular tower. That connection requires the phone's cellular radio to transmit. Airplane mode turns the radio off. So the chain breaks at the radio level. No transmission means no connection means no activation.

This is also why we recommend installing before you fly: at home, you're not abroad yet, so even with cellular on the eSIM doesn't accidentally activate against a domestic partner network (most travel eSIM partners don't operate in your home country). Pre-flight install is the safest combination. Wi-Fi for install, no risk of accidental activation because there's no partner network nearby.

A note on US iPhone 14+ and eSIM-only models

If your phone has no physical SIM tray (US iPhone 14, 15, 16), you might be tempted to install Eflexsim as your only eSIM during a flight. Be careful. Without your home line's eSIM, you'd have no fallback if the Eflexsim install fails. The clean flow is:

• Keep your home line's eSIM installed alongside Eflexsim.
• Install Eflexsim as a second eSIM on the plane or before.
• Keep both eSIMs available even after activating Eflexsim.

If you're switching phones during travel and your home line isn't installed on the new device yet, install at home with both Wi-Fi and time to handle errors. Doing both home-line eSIM transfer AND Eflexsim install in airplane mode on a flight is risky. Too much to go wrong without help.

For the standard install flow, see iPhone install or Android install. For the safest pre-flight prep, see activate before your flight.