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Setting up an eSIM before a trip takes a few minutes on an iPhone and a little longer on Android.
This guide breaks down how to install eSIM on iPhone and how to complete the same setup on Android, using the GigSky app as the example, since it skips QR codes and manual carrier settings entirely.
You can test it out with a free trial that needs no credit card, or check whether your eligible Visa card unlocks up to 5GB of free data across 175+ destinations.
Once the eSIM is installed and labeled correctly, your phone connects the moment you land, no airport troubleshooting required.
Somewhere between packing and printing boarding passes, figuring out your phone's data plan tends to fall through the cracks.
And then you land somewhere and spend the first twenty minutes at the airport trying to figure out why nothing is working.
An eSIM solves that. You set it up before you leave, it's ready when you land.
Try GigSky Free. Download the app now and the eSIM trial will be waiting when you finish the rest of this guide.
Budget Android phones are the exception on compatibility, so if you're not sure, search your model directly and you'll get a clear answer either way.
Once both checks come back clear, you're ready to go.

GigSky has a free eSIM trial available inside the app. No credit card required. Download the app and you'll see the trial on the home screen.
It's a small data allowance, enough to verify the connection is working and that your device accepted the eSIM correctly.
The other route is through an eligible Visa card benefit. Eligible Visa cardholders get up to 5GB of free data, valid across 175+ destinations for 15 days from when the plan is redeemed.
Check eligibility through the Visa Benefits tab inside the GigSky app. You'll enter your card number, but you're not being charged. It's only an eligibility check.
These steps apply to iPhones running iOS 16 and above. iPhone 12, 14, 15, 16, all the same process.
Open the GigSky app. Go to My Plans. Find your plan and tap "Install eSIM." A prompt appears asking whether to install now or later. Tap Install Now.
Heads up: if you're already in a country or region the plan covers, the app will warn you that installing will start the plan immediately. More on timing in a moment.
After that first prompt, you'll land on a Get Started screen with a button that says Install on this device. Tap it. Below that you'll see options for installing on a different device (iOS, iPadOS, Android, Windows). That matters if you bought a plan for someone else's phone.
A Getting Ready screen walks you through what comes next. It tells you to set your GigSky plan to Cellular Data and keep your home carrier as Primary for calls and iMessage. Read through it, make sure you're on Wi-Fi, then tap Get Started. Wi-Fi is required for the eSIM to download.
Your iPhone will ask permission to add the new eSIM. It'll share your EID with the network to verify the profile. Tap Activate and the setup continues.
A screen confirms your new GigSky eSIM is ready. Tap Continue and your iPhone takes a few seconds to set everything up.
When you see Cellular Setup Complete, tap Done. The eSIM is now on your phone.
iOS detects the new plan and prompts you to add it. Tap Continue to confirm.
This is the step most people skip and then wonder why their home carrier is still handling data abroad. iOS asks you to label your cellular plans. Set your GigSky plan to Cellular Data and your home carrier to Primary. Then tap Continue. This tells your phone which line to use for data when you're traveling.
Right after the label step, you'll see a toggle for Allow Cellular Data Switching. Turn it off. If it stays on, your phone can quietly switch to your home carrier's data when GigSky signal dips, which can lead to unintended roaming charges from your home carrier. On the next screen, turn off data roaming for your home carrier line too.
Go to Settings, tap Cellular, find GigSky in your SIM list, and toggle Turn On This Line to on. That's it. The eSIM is installed and ready.
Set your GigSky label to Cellular Data and your home plan to Primary. Then turn off Allow Cellular Data Switching. That two-minute step saves a lot of headaches later.
Android is a bit more involved because the menu names vary by manufacturer. The GigSky app starts the process the same way, but then hands off to your phone's system settings for the actual installation. Steps for Samsung Galaxy and Google Pixel are both covered below.
Open GigSky, go to My Plans, and tap Install eSIM next to your plan. Confirm with Install Now. Same note as iPhone: if you're in a covered location, installing immediately starts the plan.
On the Get Started screen, tap Install on this device. Different device options appear below for Android, iOS, iPadOS, and Windows.
A second Install Now prompt confirms you want to proceed. Tap it and the app directs you to your phone's settings.
The app asks you to label the device. Something simple works, like your name or just the phone model. Useful if you're managing multiple GigSky devices in the same account.
Tap Install eSIM in the app. Make sure you're connected to Wi-Fi. The app then hands off to your phone's system settings to pull down the eSIM profile.
On Google Pixel: Settings, then Network & Internet, then SIMs, then Add SIM. On Samsung Galaxy: Settings, then Connections, then SIM Manager, then Add SIM. Both get you to the same screen.
Select Set up an eSIM. On Pixel, tap Use a different network. On Samsung, tap Other ways to connect to a mobile network. Then tap Scan QR code, or if you're following the in-app flow, the GigSky profile should already be available to select from the list.
GigSky will appear in the list of available profiles. Tap it to download and install the eSIM.
Go back into Settings and find GigSky in your SIM list. Toggle Use SIM to on. You'll see your data balance and how many days are left on the plan. Turn this on the day before departure or right as you're heading out the door.
Always confirm Wi-Fi is connected before your phone goes into Settings to download the eSIM profile. A dropped connection mid-download can interrupt the installation and require you to start over.
Most travelers won't need one. With GigSky, the app handles installation directly. But if you're troubleshooting how to install eSIM on iPhone without a second device or printer, most modern phones can scan a QR code from a saved screenshot.
On iPhone running iOS 17.4 or later: take a screenshot of the QR code from your email, save it to Photos. Then open the Camera app (not Photos), tap the photo library icon at the bottom left, find the screenshot, and tap and hold the QR code. An Add eSIM option will appear.
On Samsung Galaxy: screenshot the QR code with power plus volume down. Go to Settings, Connections, SIM Manager, Add SIM, Set up an eSIM, Other ways to connect to a mobile network, Scan QR code, and then tap the photo gallery icon to pick your screenshot.
On Google Pixel: same screenshot method. Then Settings, Network & Internet, SIMs, Add SIM, Set up an eSIM, Use a different network, and tap Scan from photo.
Not every Android device supports QR scanning from a saved photo. If yours doesn't, a free QR code scanner from the Play Store fills the gap.

The day before departure, or a few hours before you leave, is the sweet spot.
Here's why timing matters: your data plan starts counting from the moment it's set up on your device in a covered location.
You have up to one year from purchase to set up the plan, which gives you flexibility. But once it's live, the clock is running.
Setting it up a week before you fly means you've already used several days of your plan before the trip even begins.
The better move: install the eSIM a day or two before departure while you're still home and on Wi-Fi.
Then turn the line on once you're heading to the airport or just before takeoff. Your plan starts when you need it, not before.
If you're cruising with GigSky, the same logic holds. Install it before you board. Coverage runs across 290+ ships at sea, not just in port, so you'll have data between destinations, not just when the ship stops.
Yes, your home SIM stays active for calls and SMS. The dual-SIM setup lets GigSky handle data while your primary line handles everything else.
Just know that answering calls or sending texts through your home number while abroad may still trigger roaming fees from your home carrier, depending on your plan. Check with them before you travel if that's something you want to avoid.
With GigSky, you have up to one year from the date of purchase to set up the plan. If your trip falls through, the plan stays in your account and you can use it for a future trip to the same region, as long as you set it up within that window.
No. The eSIM installs once and stays on your phone. For future trips, you just buy a new plan in the app, turn on the GigSky line before you leave, and you're good. Nothing to reinstall.
No. Everything happens inside the GigSky app and your iOS settings. No computer, no QR printer, no extra hardware needed.
It happens when you're already in a location your plan covers at the time of installation. The app gives a warning before this happens, so if you missed it, that's what occurred. Reach out to GigSky support through the Help tab in the app and they can look at your account.
Try GigSky Free anytime from the app's home screen, no commitment required before your trip.
This covers how to install eSIM on iPhone and Android before you ever leave home. Download the GigSky app, search your destination or cruise line, and get set up before your next trip.
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