If your trip involves a connection, you may be wondering whether it's okay to use your phone at the layover airport, or worrying about racking up roaming charges without realizing it. This article focuses on exactly that: how to think about and set up your phone while you're in transit. The short version: keep airplane mode on throughout your layover and turn on Wi-Fi only when you need it. Switch on your eSIM line only once you've confirmed that your plan actually covers the country or region you're connecting through.
- Airplane mode + Wi-Fi is the default during a layover
- Turn on your eSIM only if your plan covers the transit country
- Keep data roaming off on your home-country line
- Even if it doesn't work at the layover, it will at your destination
During a layover, "airplane mode + Wi-Fi" is the default
As long as airplane mode stays on, your phone won't connect to any mobile network, so there's no way for unintended roaming data to occur. Turn on Wi-Fi on top of that, and you can use the airport's free Wi-Fi to message people and check your departure gate.
Think of airplane mode as a single switch that shuts off all cellular connections at once. On both iPhone and Android, you can leave airplane mode on and turn Wi-Fi and Bluetooth on individually, so there's no need to switch airplane mode off after landing. The common reflex of "just turning airplane mode off" as soon as you get off the plane is best avoided at a layover airport.
What you can do with Wi-Fi alone
- Message and make app calls on WhatsApp, Messenger, and similar apps
- Check the gate and any delay information for your connecting flight
- Look up how you'll get around after arrival using a maps app
A few small precautions with airport Wi-Fi
At most airports, a login page appears in your browser, and you can get online after accepting the terms or registering an email address. Following a few basics goes a long way: don't connect to suspicious network names that mimic the airport or an airline, and hold off on using banking apps or creating new passwords while on public Wi-Fi.
How to decide whether to turn on your eSIM at a layover
There's really just one question: is the transit country or region included in the coverage of the eSIM plan you bought? If it is, go ahead and turn it on. If not, stay in airplane mode and use Wi-Fi only.
| Situation | What to do at the layover | Notes |
|---|---|---|
| You bought a plan for your final destination only | Stay in airplane mode (Wi-Fi only) | The eSIM line can stay off at the layover |
| You bought a multi-country/regional plan that includes the transit country | You can turn the line on | Watch the activation timing (see below) |
| You're not sure whether the transit country is covered | Don't turn it on | Check the purchase confirmation or your plan details in My Account |
| Your home-country line (primary line) | Keep data roaming off | Applies at both the layover and your destination |
With some plans, the validity period starts counting from the first time you connect to a local network. Even if you only intend to use the eSIM briefly at the layover, that can still use up a day of your plan, so it's worth checking the activation conditions in your purchase details beforehand.
Step-by-step for iPhone and Android (keeping airplane mode on)
On both platforms, the core of the process is the same: leave airplane mode on and turn on Wi-Fi by itself. Turn on the cellular line only once you've confirmed your plan covers the transit country.
On iPhone
- Open Control Center and confirm airplane mode is on.
- On the same screen, tap the Wi-Fi icon to turn it on and select the airport's network.
- Only if you're using the eSIM at the layover: go to Settings → Cellular, open the relevant line, enable "Turn On This Line," confirm that Data Roaming is off on your home-country line, and then turn off airplane mode.
On Android
- Swipe down from the top of the screen to open Quick Settings and confirm airplane mode is still on.
- Tap the Wi-Fi tile to turn it on and connect to the airport's network.
- Only if you're using the eSIM at the layover: go to Settings → Network & internet → SIMs, turn on the relevant line, confirm that roaming is off on your home-country line, and then turn off airplane mode. Menu names vary slightly by manufacturer.
For what to do after turning off airplane mode, including switching between lines and choosing which one to use for mobile data, see Phone Settings After Landing | How to Get Connected Safely from Airplane Mode. Following those steps when you reach your final destination will help you avoid the usual hiccups.
Preparation before departure that makes your layover easier
The most reliable way to avoid trouble at a layover airport is to prepare before you leave. You may not be able to open your email in transit, or the Wi-Fi may be unreliable, so add the eSIM to your phone while you're still at home.
- Install your eSIM before departure: Tap the setup link you received and follow the on-screen instructions to add the line. Having it ready so you only need to switch it on at your destination gives you peace of mind. The full process is in our setup guide.
- If you won't use it at the layover, keep the line off: Temporarily turning off the eSIM line you added prevents it from connecting unintentionally the moment you turn off airplane mode.
- Turn off data roaming on your home-country line: Doing this before you leave means one less thing to check at both the layover and your destination.
- Save things you can view offline: Screenshots or downloaded copies of your boarding pass, destination maps, and hotel address mean you're fine even if the Wi-Fi is weak.
- Charge up: The longer the layover, the more battery you'll use. A portable charger takes the pressure off.
Who this approach suits, and who should plan differently
Getting through a layover with airplane mode + Wi-Fi works for most travelers, but depending on your connection style, a different setup may make more sense.
This approach works well if you
- Have a layover of a few hours and won't leave the airport
- Bought a plan for your final destination country only
- Want to rule out roaming charges from the start
You may want to plan differently if you
- Are entering the transit country for a stopover: If you want mobile data at the layover too, options include a multi-country or regional plan, or a separate plan for the transit country. Coverage and conditions vary by plan, so enter your destinations on the comparison page to check.
- Need to be reachable by phone number: Bloomy plans are data-only, so voice calls and SMS via a phone number aren't available. App-based calling and messaging on WhatsApp, Messenger, FaceTime, and similar apps work as usual, so plan on using apps to stay in touch during your layover. If you absolutely need to be reachable by number, look into other options too, such as voice roaming on your home-country line.
Common layover problems and how to handle them
Most issues settle down once you turn airplane mode back on and check the status of your lines. Let's go through them one by one.
I turned off airplane mode and got a roaming notification
First, turn airplane mode back on. Then check that data roaming is off on your home-country line and that the eSIM line hasn't been switched on unintentionally. A notification doesn't necessarily mean significant data was used, but if you're concerned, you can check your usage with your home carrier.
I can't connect to the airport Wi-Fi
Open a browser and see whether a login page appears. If it doesn't, basic steps like turning Wi-Fi off and on again or trying a different network name often resolve it.
The transit country should be covered, but my eSIM won't connect
Check, in order, that the line is on, that the eSIM is selected as the line for mobile data, and that data roaming is on. If nothing changes, restart your phone. Connection quality depends on the local network, your device, and the area you're in, so waiting a little while sometimes helps. For more detailed troubleshooting, see What to do when you can't connect.
What Bloomy can do for you
For itineraries with a connection, the choice comes down to whether a plan for your final destination is enough or whether you want one that works at the layover too. On the Bloomy eSIM comparison page, you can search by country or region, data allowance, and validity period to find a plan that fits your trip. After purchase, you can add the eSIM with a single tap on the setup link you receive, so you can finish preparing before departure; at the layover, all you need to decide is whether to turn the line on.
If you're unsure about setup or activation timing, take a look at our FAQ. You can review the details of any eSIM you've purchased in My Account.
Summary | Airplane mode + Wi-Fi at the layover; eSIM on only where it's covered
At a layover airport, the default is to keep airplane mode on and turn on Wi-Fi only. Switch on your eSIM line only once you've confirmed your plan covers the transit country or region, and keep data roaming off on your home-country line. If you install the eSIM and sort out your roaming settings before departure, then at both the layover and your final destination, the only thing left to do is turn the line on. For the steps after you arrive at your final destination, continue with our article on phone settings after landing.
* The information in this article is current as of September 2026. Setting names on your device, plan coverage and activation conditions, and connection quality vary by device, local network conditions, and plan, and are subject to change. Please check the latest details, including pricing, at the time of purchase.
