eSIM or rental Wi-Fi?

If your family stays together and one connection is enough, an eSIM is lighter. If you often split up, rental Wi-Fi that connects several devices can suit better.

Can I make phone calls?

Most travel eSIMs are data-only. For calls and texts, app-based calling (like LINE) is the usual workaround.

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Travel eSIM Guide: The Easiest Way to Stay Connected Abroad with Kids

※ This article contains affiliate links (ads).

Having maps, translation, and ride-hailing the moment you land—that "instantly connected" reassurance matters a lot when traveling with kids. Rental Wi-Fi and local SIMs used to be the norm, but today an eSIM is simpler and more convenient. This guide covers how eSIMs work, how to choose one, and how to use it.

What you'll learn

What to do before you leave versus after you land
How to check whether your phone supports eSIM
The biggest advantage for families: keeping your home number
Tethering — the condition that is easy to miss
How eSIM compares with pocket wi-fi and a local SIM

1. What an eSIM is: a SIM you never swap

An eSIM is built into the phone. Instead of exchanging a physical card, you write a profile onto it via a QR code or an app.

For family travel this matters more than it sounds. There is no hunting for a SIM pin and juggling a tiny card at an airport while watching a child, and nothing to lose.

2. The main advantage: keep your home number

Phones that support eSIM generally operate as dual SIM (a physical SIM plus an eSIM, or several eSIMs). Which means you can keep your home line active and add local data alongside it.

Concretely, this matters because:

School and family reach you by SMS — keeping the home number alive means you receive it
Bank and service verification codes arrive by SMS to that number. If a card gets blocked mid-trip, you are stuck without it
Voice calls in an emergency remain possible, not only data

Local eSIM for data, home number for calls and SMS is the most stable arrangement in practice. Do remember to switch data roaming off on the home line.

3. Before you leave, and after you land

Get this the wrong way round and you will be scrambling on arrival.

Before departure, at home on wi-fi

Confirm your phone supports eSIM and is carrier-unlocked
Buy the eSIM and install the profile onto the phone
If the product needs an app, install that too

After you arrive

Turn the eSIM line on
Turn data roaming off on your home line
Enter the APN settings if the product requires them

Installing the profile requires an internet connection. Leave it until you land and you cannot install it because you have no connection — a genuine trap. Buy and install at home; activate on arrival.

💡 With children: do the setup at home once they are asleep. It is not a job for an airport departure gate.

4. Checking your phone

Broadly, recent iPhones and major Android handsets support eSIM, but it varies by model and by the region it was sold in. The way to check differs by device, so confirm your specific model with the manufacturer's official information.

Check carrier locking at the same time: a locked handset may refuse another provider's eSIM. Your carrier's own guidance will tell you the status.

5. The condition people miss: tethering

This is especially important with a family, and especially easy to overlook.

Whether tethering (internet sharing) is permitted varies by eSIM product. Some do not allow it.

On a family trip you often want one parent's phone carrying a child's tablet and a partner's handset, because it is cheaper than buying an eSIM each. Buy a product that forbids tethering and that plan collapses. Check before purchase.

6. How much data

Choosing a size is awkward, because travel usage differs from ordinary usage.

Maps, search and messaging need less than you would expect
Video for the children should be budgeted separately — though the right answer is to download it before you leave, which also saves data
Automatic photo backup deserves attention: left on, it will consume a great deal across a trip

That last one catches people constantly. Set your photo app to back up on wi-fi only before you go.

7. Versus pocket wi-fi and local SIMs

eSIM: nothing extra to carry, nothing to collect or return. With children that counts. It does require a compatible phone
Rental pocket wi-fi: connects several devices regardless of handset. But you carry it, charge it and return it. One more object and one more errand, which is precisely what you do not want with children
Buying a local SIM: often cheapest, but you need time on arrival to find a shop and complete the paperwork — queueing at a counter with children, budgeted into your itinerary

My own view is that for a short family trip, eSIM fits best. Collection, return, loss and charging all stop being concerns at once.

📌 Last updated: July 2026. Device support, pricing, tethering permissions and APN settings vary by product and change over time. Confirm with the provider's official information before buying. This article recommends no particular product.

FAQ

Q. Can we buy an eSIM after we arrive? A. You can buy one, but installing the profile needs an internet connection — which you do not have yet. Buy and install before departure, activate on arrival.

Q. Do we lose our home phone number? A. No. As dual SIM, you keep the home line and route only data through the local eSIM. You will still receive SMS verification codes, which is a reason to keep it. Switch data roaming off on the home line.

Q. Can the family's other devices connect? A. Only if the product permits tethering, and some do not. Check before you buy.

Q. How many gigabytes do we need? A. Less than you think for maps, search and messaging. Download video before you leave and set photo backup to wi-fi only, and consumption drops sharply.

Useful for planning

PR: contains affiliate links.

Travel eSIM (Yesim)