How to Set Up an eSIM Step by Step: From Pre-Departure Prep to Getting Connected on Arrival

You can set up your eSIM before you leave. Check that your phone supports eSIM, tap the setup link you received to add it, and turn the line on once you arrive. You don't need to swap any physical SIM cards. If you go step by step, setup usually takes about 10 minutes, even the first time.

What to do first when setting up an eSIM

The first thing to check is whether your phone supports eSIM. If you skip this and buy a plan, you may get stuck partway through setup.

Check these three things:

• Your phone supports eSIM
• The phone isn't SIM-locked (if it was bought through a carrier)
• You have an internet connection, such as Wi-Fi, during setup

Supported devices vary by model. You can check the supported devices page before you buy. To find out whether your phone is SIM-locked, check your mobile carrier's website or contact them.

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Understanding the setup flow

Knowing the whole process in advance makes the screens easier to follow. Here's the flow:

Activation timing varies by plan. Check your purchase instructions to see when the validity period starts counting.

Before you leave: adding your eSIM

With Bloomy, you can set up the eSIM by tapping the setup link you receive after purchase. You usually don't need to scan a QR code.

Basic steps

1. While connected to Wi-Fi, open the setup link on your phone
2. Tap the link
3. Follow the on-screen instructions to add the eSIM
4. After adding it, check that the new line appears in your mobile data list

You can find the setup link in your purchase confirmation email or on the My Account page. If you can't find the email, checking My Account is usually the quickest option.

What to do after adding it

Renaming the line makes it easier to tell apart. It will appear alongside your regular line, so give it a clear name you'll recognize, such as “Travel eSIM.”

You don't need to turn the line on yet. It's fine to wait until you arrive. If you turn it on before you leave, some plans may start the validity period right away.

Differences between iPhone and Android

Menu names vary by OS version and device model. Here are the general locations:

iPhone

Open the Settings app and tap “Cellular” (or “Mobile Data,” depending on your version). Your added line will appear there. Select the eSIM line and switch it on or off. The key is to set the eSIM as the line used for cellular data while you travel.

Android

Go to Settings, open “Network & internet,” and tap “SIMs.” Names differ by manufacturer, and you may see “Connections” or “Mobile network” instead. If you can't find it, search for “SIM” in the Settings search bar.

On both platforms, the exact screens vary by device. If you're unsure, search for “SIM” or “Cellular” in your Settings and you'll usually find the right place. For detailed step-by-step screens, see the Setup Guide.

What to do after you arrive

Once you land, turn off Airplane Mode and then check the following in order:

1. Turn on the eSIM line in your mobile network settings
2. Set the eSIM as the line for mobile data
3. Turn on data roaming for the eSIM line
4. If needed, turn off mobile data on your regular SIM from home

After a few minutes, your local carrier's name and signal bars should appear at the top of the screen. To confirm the connection, open a map app to see your location, or load a web page in your browser.

If you forget to turn off mobile data on your regular SIM from home, you may be charged expensive roaming fees without realizing it. Make sure the eSIM is set as the data line for overseas use.

Four things to check if you can't connect

If you've set everything up but still can't get online, check these in order. In many cases, one of them is the fix:

• Is the line turned on?: You may have added the eSIM without turning it on.
• Is the eSIM set as your data line?: If your home line is still selected, local data won't be used.
• Is data roaming on?: You need to turn this on for the eSIM line.
• Are you in a place with signal?: Arrival halls and underground areas can be hard to connect in. Moving to a different spot may help.

If it still doesn't work, turn Airplane Mode on and off, then restart your device. Connection quality depends on the local network, congestion, and your device, so it may connect after some time. For solutions to specific situations, see the Connection Troubleshooting Guide.

Things to consider when choosing a plan

The setup steps are nearly the same across plans. What differs is the combination of destination, data amount, and number of days.

For a short trip where you mainly need maps and messaging, a smaller data amount may be enough. If you watch videos or use social media a lot, or want to use hotspot (tethering) for a laptop, leave some extra room. Hotspot availability depends on the plan, so check the conditions before buying. Some plans are also subject to a fair use policy, so extremely heavy usage may be limited.

You can search for a plan by destination, data amount, and number of days on the eSIM comparison page. Available plans and prices vary by country and region, so check the latest information on the comparison page before you purchase.

Common setup pitfalls and how to prepare

Trying to set up on the day of departure

If you start setup at the airport, unstable Wi-Fi can make it take longer. Choose a relaxed day and finish setup at home on your Wi-Fi.

Opening the setup link on the wrong phone

The link needs to be opened on the device where you want to install the eSIM. If you're reading your email on a computer, open the same email on your phone.

Changing or resetting your phone

An eSIM is tied to the device it was installed on. If you reset or switch phones after purchase, it may not work as is. Once setup is complete, avoid resetting your device until your trip is over.

You can also find answers to common questions in the FAQ. Reading it before you travel can help ease any worries.

Next steps

If you haven't chosen a plan yet, first check that your device supports eSIM, then look for a plan that fits your destination on the comparison page. If you've already purchased, tap the setup link on Wi-Fi before you leave to add the eSIM, and turn the line on once you arrive.