The worst time to set up a travel eSIM is at the airport. You're rushing to your gate, the terminal WiFi is painfully slow, your phone screen is hard to read in the bright lighting, and the last thing you want is to be fumbling through cellular settings with a boarding announcement in the background.
The best time is at home, a day or two before your flight. You have good WiFi, time to troubleshoot if anything goes wrong, and you can confirm everything is working before you ever leave your house. When you land at your destination, you'll switch on data roaming and your eSIM connects automatically. No queues, no SIM swapping, no hunting for an airport kiosk.
This guide walks through the full process: checking your phone is compatible, purchasing your plan, installing the eSIM profile, and configuring your phone correctly before departure.
Before You Start: Phone Requirements
eSIMs require a compatible device and a network-unlocked phone. Both conditions need to be met.
eSIM compatibility
Most flagship smartphones released after 2018 support eSIM. iPhones from XS onwards, Samsung Galaxy S20 and later, Google Pixel 3 and later, and most current flagship phones from other manufacturers all support eSIM. Budget and mid-range Android phones are more variable — many do support eSIM, but not all. If you're unsure about your specific model, check our compatible devices list or look in your phone's Settings under "Mobile Network" or "SIM card" — if you see an option for "Add eSIM" or "Add Mobile Plan," your device supports it.
Network lock status
A locked phone only works with the carrier it was locked to. If you bought your phone directly from a carrier on a contract, it may be locked. Phones bought outright, or from manufacturers directly (like Apple.com or Samsung.com), are typically unlocked.
You can usually check this in Settings: on iPhone, go to Settings → General → About and look for "Carrier Lock." If it shows "No SIM restrictions," you're unlocked. On Android, the path varies by manufacturer — Settings → Connections → SIM card manager, or contact your carrier and request unlock status. Most carriers unlock phones after the contract period ends, often for free.
Do not skip the unlocked phone check. Installing an eSIM profile on a locked phone will fail at activation, and you won't get data even though the eSIM appears installed. Confirm your phone is unlocked before purchasing a plan.
Step 1: Purchase Your eSIM Plan
Browse available plans for your destination and choose one that suits your trip length and estimated data needs. After completing the purchase, you'll receive a QR code — either displayed on-screen or sent to your email. This QR code contains the eSIM profile information your phone needs to install the plan.
Keep this QR code accessible. You'll need it in the next step, and you can only scan it once on most plans. Screenshot it, save the email, and if you have it on-screen, don't close that tab before installing.
Step 2: Install the eSIM Profile
eSIM installation on both iPhone and Android follows the same basic pattern: go to your cellular/mobile settings, choose to add a new plan, and scan the QR code. The specifics differ slightly by platform.
iPhone (iOS)
- Open Settings
- Tap Mobile Service (or "Cellular" depending on your region)
- Tap Add eSIM (or "Add Mobile Plan" on older iOS versions)
- Choose Use QR Code
- Scan the QR code from your purchase confirmation
- Follow the on-screen prompts to confirm the plan details
- Tap Add Mobile Plan to complete the installation
If you're installing from the same device that received your QR code by email, you can also tap the QR code image directly in some email clients to trigger installation without needing to scan it with the camera.
Android (Samsung / Google Pixel)
- Open Settings
- Go to Connections → SIM card manager (Samsung) or Network & internet → SIMs (Pixel)
- Tap Add eSIM or the + icon
- Choose Scan QR code
- Scan your eSIM QR code
- Confirm the plan details and complete installation
On some Android phones, the path is Settings → Connections → Mobile networks → Add mobile plan. The exact wording varies by manufacturer and Android version, but you're always looking for something related to adding a new SIM or mobile plan.
You need a WiFi connection to install an eSIM profile — the phone downloads the plan data from the carrier's servers during installation. Make sure you're on a stable WiFi network, not just mobile data from your existing SIM, before starting the installation process.
Step 3: Label and Configure the eSIM
After installation, your phone will ask you to name the new plan. Give it a recognizable label — something like "Italy Trip" or "Europe eSIM" — so you can identify it easily in settings later. This matters when you have both your home SIM and the travel eSIM active on a dual-SIM phone.
Next, set up which SIM handles which functions. This is the part most people skip, and it causes unnecessary confusion at the airport or on arrival.
On iPhone
Go to Settings → Mobile Service. You'll see both your home SIM and the newly installed travel eSIM listed. For now, you don't need to change the default line — you want to keep your home SIM as the primary for calls and SMS. Leave data roaming OFF on the travel eSIM for now. You'll turn it on after landing. The important thing is that the eSIM is installed and appears correctly in the list.
On Android
Go to Settings → Connections → SIM card manager. Here you can see both SIMs and assign which handles calls, messages, and mobile data. Keep your home SIM as the default for calls. You can set mobile data to your travel eSIM now if you want, or wait until you arrive — either approach works.
Step 4: Confirm the eSIM Is Installed Correctly
Before you leave home, take a moment to verify the installation looks right:
- The new plan appears in your SIM/cellular settings with the name you gave it
- The plan shows as "Installed" or "Active" (not "Error" or missing)
- Your home SIM is still functioning normally — calls and data still work on your original line
You don't need to see signal from the travel eSIM yet — it won't show the destination carrier's network until you're in that country. What you're confirming is that the profile is correctly installed and ready to activate.
Some eSIM plans start their validity period from the moment data is first used, not from installation. Others start counting from the purchase date or from a fixed start date. Check the plan terms so you know which applies — you don't want a 7-day plan ticking down while the eSIM sits unused for three days before your flight.
Step 5: Download Offline Maps and Media
While you still have home WiFi, this is the ideal moment to download anything you'll want offline. Google Maps offline regions, Spotify playlists, any Netflix shows for the flight, Google Translate language packs. Getting these on-device now means you're not burning data on arrival trying to download maps while you're already trying to navigate.
See our guide on setting up your phone for offline travel use for a fuller checklist.
What Happens When You Land
You land, the plane doors open, and your phone picks up signal from local towers. At this point, your travel eSIM is installed but data may not be active yet — depending on how the plan is configured, it either activates automatically when it detects the local network, or you need to manually enable data roaming on the eSIM line.
On iPhone: Settings → Mobile Service → tap your travel eSIM → turn on "Data Roaming." Then go back to the main Mobile Service screen and make sure your travel eSIM is selected as the data line.
On Android: Settings → Connections → SIM card manager → Mobile data → select your travel eSIM.
Within a minute or two, you should see the local carrier name appear in your status bar and data should start working. The first useful test is opening Google Maps or a browser — if a page loads, you're connected.
If data doesn't work immediately after landing, don't panic. Our article on troubleshooting eSIM issues after arrival covers the common causes and how to fix them quickly.
Common Pre-Flight Installation Mistakes
A few things trip people up that are easy to avoid:
- Scanning the QR code on mobile data instead of WiFi. The installation download needs a stable internet connection, and airport or café WiFi can be unreliable. Install at home.
- Losing the QR code before scanning it. Most eSIM QR codes are single-use — if you scan and the installation fails, you may need to request a new one. Don't delete the email or close the confirmation page until the installation succeeds.
- Installing on a locked phone. The eSIM installs but data won't activate on a carrier-locked device. Verify unlocked status first.
- Forgetting to check data roaming settings. Even with the eSIM installed, data won't flow if data roaming is turned off on that line. This is the most common cause of "my eSIM isn't working" reports immediately after landing.
- Buying the wrong destination plan. A plan for Italy won't work in Spain unless it's a regional plan that covers both. Double-check the coverage before purchasing.
Installing your eSIM before you fly is genuinely one of the easiest things you can do to improve your first hour in a new country. You step off the plane with maps already downloaded, your connection ready to go, and no need to find a SIM vendor or decode an unfamiliar airport's cellular kiosk. For more detail on the full eSIM setup process, visit our eSIM setup guide.