eSIM or local SIM: which one is worth it for your trip

The short answer: a local SIM is usually cheaper per gigabyte, and an eSIM saves you time and paperwork. Which one wins depends on how long the trip is, how many countries you pass through, and how much you value not losing an hour hunting for a shop on your first day.

This guide tries to be fair to both, including the times when an eSIM is not the better option. We sell eSIMs, so let us say it up front: there are trips where it is not worth it, and they are below.

When the local SIM wins

Long trips in countries with cheap data. If you are spending a month in Thailand, Vietnam or Indonesia, a local SIM with a generous bundle costs very little and the gap against any eSIM shows. The longer the trip, the more the price per gigabyte matters and the less the time spent getting it.

When you genuinely need a local number. Not for calling home, but because some things demand it: verifying a ride-hailing or delivery app, letting the driver ring you, booking a restaurant, or any service that texts a confirmation code to a local number. A data eSIM does not give you that. It is the most real limitation it has.

If you use a lot of data. Working from your phone, uploading video daily, tethering your laptop. There, volume rules and genuinely unlimited local tariffs are hard to beat.

When the eSIM wins

Short trips. A week or ten days. The saving from a local SIM comes to a few euros, and to get it you spend your first morning finding a shop, queueing and filling in a form. On a short trip, that morning is a noticeable slice of the holiday.

When you cross several countries. One card per country is one queue per country, and carrying four loose SIMs in a backpack ends badly. A regional plan covers the whole route with a single profile. It is the biggest difference between the two options and the one least considered when planning.

So you are not offline when you land. This is the part people discover late. The hours when data matters most are precisely the first ones: getting a taxi without being ripped off, finding the place you are staying, telling people you arrived, checking whether the train leaves from another terminal. With a local SIM, those hours are exactly the ones you spend without a local SIM.

When the paperwork is a chore. In some countries buying a prepaid line as a foreigner is not a five-minute affair. In India registration is tied to the national identity system and for a tourist it is a slog. In plenty of places there is passport registration, a photo and hours of waiting. And in Japan prepaid voice lines for tourists barely exist: what is sold is data. In those destinations the comparison changes a lot.

If your phone has a single SIM slot. Putting in a local SIM means taking yours out, and with it go the bank texts and calls to your number. With an eSIM your line stays active; only the data changes.

In a table

	Local SIM	Travel eSIM
Price per GB	Usually cheaper	Somewhat dearer
When you get online	When you find the shop	The moment you leave airplane mode
Your own number	Goes dark (single slot)	Stays active
Local number for texts	Yes	No
Several countries	One card per country	One regional plan
Paperwork	Passport, form, sometimes biometrics	None
Risk	Losing it, being sold the wrong thing	Phone must support eSIM and be unlocked

The detail that skews every comparison

Almost every comparison you will read uses the price of a local SIM from a shop in town. But the SIM most people actually buy is the one from the airport counter, which usually costs considerably more for the same thing, sometimes double. That is the price of not having to look for anything.

If you want a fair comparison, compare against that price, because it is the one you will end up paying if you land with no data and in a hurry. Against the shop in town the local SIM wins almost always; against the airport counter, it is a much closer call.

What neither option changes

Coverage. A travel eSIM connects to local carriers’ masts, exactly the same ones a SIM bought there uses. There is no worse “tourist network”: it is the country’s network.

So if you are in a valley with no coverage, on a train through the mountains or on a small island, neither will give you internet. Worth knowing before blaming the eSIM for something that happens to locals too.

And the combination almost nobody considers

It is not one or the other. On long trips, both:

You arrive with the eSIM already installed and have internet from minute one. That handles the taxi, the accommodation and the message home without stress. And the next day, calmly, you buy the local SIM in a shop in town — not at the airport — comparing properly and without haste pushing you into the first thing offered.

The eSIM’s cost in that setup is small, and it buys exactly what is most expensive to be without: data in your first hours somewhere unfamiliar.

In short

• Under two weeks, or several countries: eSIM, comfortably.
• A month or more in one cheap country: local SIM, or both combined.
• You need a local number for apps and calls: local SIM, no argument.
• India, Japan or anywhere with awkward paperwork: eSIM, and skip the problem.

If you need to work out how much data to buy, the figures by app are in how much data do I need for a trip. And if you go for an eSIM, the full setup is in how to install an eSIM step by step; plans by country are on the destination pages.