8 Phone Settings to Change Before You Fly to Europe
Before you fly to Europe, check your phone is unlocked, install a travel eSIM for data, switch off roaming on your home line and turn on Wi-Fi calling. Then set data limits so background apps cannot drain your plan. Do it all at home on Wi-Fi, well before you reach the airport.
Updated 27 October 2026
This list is for anyone heading to Europe who wants working data and no surprise charges from their home carrier. The first thing to do is confirm your phone is unlocked, because everything else depends on it. Work through the rest in order while you still have reliable home Wi-Fi.
1. Check your phone is unlocked
A phone locked to your home carrier may refuse to install a travel eSIM, which leaves you hunting for a fix in an arrivals hall.
How: On iPhone, open Settings, General, About and look for the Carrier Lock entry, which should say there are no SIM restrictions. On Android, or if you are unsure, ask your carrier to confirm the phone is unlocked.
Tip: If your phone is still being paid off, ask your carrier what its unlock rules are well before you travel.
2. Update your software and carrier settings
Updates often include fixes for eSIM installation and Wi-Fi calling, and you do not want a large download eating your data abroad.
How: Connect to home Wi-Fi, plug in your charger, then open Settings, General, Software Update on iPhone or Settings, System, Software update on Android. Install anything pending and restart the phone.
Tip: Do this a few days before you leave so there is time to fix a problem if an update goes wrong.
3. Install your travel eSIM before departure
Having data ready the moment you land means you can open maps, message your ride or contact your accommodation without hunting for airport Wi-Fi.
How: Fresim creator stores sell travel eSIMs, delivered by email with one-tap install buttons: tap Install on iPhone (iOS 17.4+) or Install on Android (Android 10+) on your phone while on home Wi-Fi. Follow the plan's instructions about when it starts, and keep the QR code from the email as a backup or to install from another screen.
Tip: Prices and plans vary by destination and are set by each store, so check the plan covers every country on your route.
4. Name your eSIM and home lines
With two lines on one phone, it is easy to send data over the wrong one, which is how roaming charges happen.
How: On iPhone, open Settings, Cellular (or Mobile Service), tap each plan and give it a clear label such as Home and Travel. On Android, open Settings, Network and internet, SIMs and rename each entry.
5. Set mobile data to the travel eSIM
Choosing the travel eSIM as your data line stops apps from quietly using your home plan as soon as you land.
How: On iPhone, go to Settings, Cellular, Cellular Data and select your travel line. On Android, go to Settings, Network and internet, SIMs and set the travel eSIM as the mobile data line.
Tip: Switch off the option that lets the phone change data lines automatically, so it cannot fall back to your home plan.
6. Turn off data roaming on your home line
Roaming on your home line can be billed at your carrier's international rates, and background apps can use it without you noticing.
How: Open the settings for your home line (Cellular on iPhone, SIMs on Android) and switch Data Roaming off for that line only. Leave your home line on for calls and texts if you want to keep receiving verification codes.
Tip: Your travel eSIM line usually needs its own Data Roaming switch turned on to connect, so follow the plan's instructions for that line.
7. Turn on Wi-Fi calling
Wi-Fi calling lets you call and text from your home number over hotel or cafe Wi-Fi without using mobile data or relying on a local signal.
How: On iPhone, open Settings, Cellular, then your home line, then Wi-Fi Calling and switch it on. On Android, look in Settings, Network and internet, SIMs (or the Calls settings) and enable Wi-Fi calling.
Tip: Support depends on your carrier, so check their terms for how calls made from overseas are charged.
8. Set data limits and Low Data Mode
Automatic app updates, photo backups and video previews can burn through a travel plan quickly, leaving you with no data for navigation.
How: On iPhone, turn on Low Data Mode under Cellular, Cellular Data Options, and turn off cellular use for large apps in the Cellular list. On Android, turn on Data Saver and set a data warning or limit under Settings, Network and internet.
Tip: Set app stores and cloud photo backups to update over Wi-Fi only.
Staying connected
The easiest way to have data on arrival is a travel eSIM from a Fresim creator store: the delivery email has Install on iPhone (iOS 17.4+) and Install on Android (Android 10+) buttons, and one tap installs it. The QR code in the same email is the second option, handy for sharing the eSIM or installing it from another screen. Once it is installed and set as your data line, you only need to follow the plan's start instructions when you land.
Checklist
- Confirm phone is unlocked
- Update software on Wi-Fi
- Install travel eSIM at home
- Label lines, pick data line
- Roaming off, Wi-Fi calling on
- Set data limits
Planning the trip? eSIM for Europe: Complete Travel Data Guide [2026]
Frequently asked questions
Should I turn off data roaming when I travel to Europe?
Turn it off on your home line so your carrier cannot bill you for roaming data. Your travel eSIM line usually needs Data Roaming switched on for that line only, so follow the instructions that came with the plan.
Can I install a travel eSIM before I fly?
Yes. Install it at home on Wi-Fi using the one-tap Install on iPhone (iOS 17.4+) or Install on Android (Android 10+) button in the delivery email, then check the plan's instructions for when it starts. The QR code in the email is a backup or a way to install from another screen.
Will Wi-Fi calling work in Europe?
It often does, as long as your carrier supports it and your phone has a Wi-Fi connection. Turn it on before you leave and check your carrier's terms for how calls from overseas are charged.
Can I keep my home number active while using a travel eSIM?
Yes, on most dual-SIM capable phones. Keep your home line on for calls and texts, set the travel eSIM as your mobile data line, and switch off data roaming on the home line.
How do I know if my phone supports eSIM?
Many recent phones do. Look for an option to add an eSIM or a mobile plan in your cellular or SIM settings, or check your phone maker's support page for your model. Fresim's one-tap install needs iOS 17.4 or later on iPhone, or Android 10 or later on Android.
More travel lists
Run a travel channel? Sell eSIMs under your own brand.
Sources
- Apple Support — Use Wi-Fi calling on iPhone
- Apple Support — Use Dual SIM and eSIM on iPhone
- Google Android Help — Manage SIMs, mobile data and Wi-Fi calling on Android