eSIM vs SIM card: which one should you choose?

The difference fits in one sentence: the physical version is removable and slides into the phone's tray, while the eSIM is soldered into the device and your plan is loaded onto it remotely.

Otherwise, they do the same thing. Each one holds the information that identifies you: your number, your authentication keys and your plan. Once it's up and running, nothing changes in everyday use: calls, texts and mobile internet on 4G or 5G.

What really changes is how you get it, set it up and replace it:

• the physical version is bought in a store or arrives by mail, then you insert it by hand;
• the eSIM is bought online and installed by scanning a QR code or from the provider's app, with nothing to handle;
• a physical card holds a single plan, while an eSIM can store several.

The SIM card (short for Subscriber Identity Module) is the small smart card carriers have been handing out since GSM arrived in the early 1990s. It identifies the user on the network: without it, there are no calls and no mobile data.

Over the years, the traditional SIM card has shrunk to make room for other components:

• the mini SIM, the original format of the first phones;
• the micro SIM, which became widespread in the early 2010s;
• the nano SIM, used by almost every device today.

It usually comes as a “triple cut” SIM: you pop out the size that fits your device. To install it, you open the tray with a paperclip or the tool supplied, place the chip in it, and the phone recognizes it within seconds.

The eSIM (short for “embedded SIM”) is a chip soldered into the phone that does the same job. It's also called an eSIM card, a virtual SIM or a digital SIM. Instead of inserting anything, you download a profile that contains your plan.

eSIM technology is found on smartphones, but also on tablets, smartwatches such as the Apple Watch, and some laptops. Each device has its own identifier, the EID number, which is sometimes requested to prepare your profile.

To understand the technology in detail, we wrote a full article on what an eSIM is.

An eSIM works like a SIM card, with no chip to handle: it's a rewritable component, soldered into the phone, that receives one or more profiles remotely. That's why it's also called a virtual SIM card.

In practice, here's what happens when you add an eSIM:

1. you choose a plan and receive a QR code or an installation link;
2. your phone securely downloads the profile from the provider's servers;
3. the profile is saved alongside the ones already there;
4. your phone connects to the mobile network, exactly as it would with a plastic SIM.

Once the eSIM is installed, calls, texts and mobile internet work just as before. You can keep several profiles and turn on the one you need, for example one for home and another for a trip.

While their role is identical, the eSIM and the SIM card differ on five practical points.

Setup and activation

A classic SIM is an object: you have to get it from a store or by mail, then insert it by hand. The eSIM is already in your phone: you download your plan from the settings, and everything is ready in a few minutes. That's its main strength: fast activation, even on the other side of the world, without looking for a store.

Device compatibility

A classic SIM card works in every cell phone, from the oldest to the newest, as long as the size fits. The eSIM needs a compatible device: that's the case for most high-end and mid-range smartphones, but not for every entry-level model.

Everyday ease of use

With a plastic SIM, switching carriers or plans often means receiving a new card and swapping it in the tray. With an eSIM, you add, turn off or delete a plan in a few taps, with no delivery to wait for.

Security if your phone is stolen

That little rectangle can be removed in seconds by a thief, who then cuts off your line and can use it in another device. An eSIM can't be removed: your phone stays reachable and trackable for longer, and your line can't be moved without going through your provider.

Multiple profiles and dual SIM

A physical chip carries only one plan. An eSIM can store several: according to Apple, an iPhone can handle eight or more eSIMs. Most current smartphones also support dual SIM mode, with two active lines at once: personal and work, or everyday and travel.

Here's the gist of the eSIM vs SIM comparison, criterion by criterion.

The plastic SIM still has real strengths, especially if your phone is a few years old.

A plan bought at the airport or from local sellers may also require ID, often your passport, depending on the country's regulations.

Compared with a SIM card, the eSIM mainly brings flexibility and speed.

Every disadvantage of the eSIM is easy to handle, as long as you know about it before you choose.

• Compatibility: your smartphone has to support eSIM. Entry-level and older phones often don't.
• Transfer to a new phone: there's nothing to move physically. Between two Apple devices, eSIM Quick Transfer takes a few minutes (iOS 18.4 or later on both devices). From Android to iPhone, or between two different brands, setup sometimes requires help from support.
• Broken or faulty phone: you can't take the chip out and put it somewhere else. You have to ask your carrier for a new profile.
• Accidental deletion: a deleted profile has to be requested again, whereas a removed SIM can still be used.
• Less intuitive first setup: scanning a QR code and choosing the right plan in the settings takes a little attention at first.

None of these issues is a deal-breaker: they just take a bit of planning, especially before replacing your phone.

Yes, for most travelers, an eSIM is more convenient than a local plan bought on arrival. You buy your plan before you leave, install it at home over Wi-Fi, and you have internet as soon as you land, without hunting for a shop at the airport.

What an eSIM changes abroad:

• nothing to sort out on arrival: no line at the airport counter, no seller who doesn't speak your language;
• price known in advance: you see the final price before you leave, with no roaming charges when you get back;
• your number stays active: you stay reachable, and you don't risk losing your usual SIM when you take it out;
• several destinations with a single plan: a regional eSIM covers several countries, while a local plan only works well in one.

Buying locally still makes sense for a long stay in a single country, with a large amount of data or a local number. For a few days to a few weeks, an eSIM is more comfortable. In the UK, for example, prepaid plans all last 30 days, even for a weekend: we compare every option in our article on choosing a UK SIM card.

Outside of travel, an eSIM generally costs about the same as a SIM card: it's the plan that makes the difference, not the format.

Depending on the carrier, the physical version is free or charged when you order it, and the eSIM is often free, sometimes offered as a paid option. Check the price on your carrier's rate sheet before signing up.

When you travel, the comparison is different: you need to weigh a travel eSIM against a plan bought locally and your own plan's international options. A local plan can be cheap, but it takes some effort and sometimes ID. Outside the area your plan covers, international passes are expensive: an eSIM usually works out cheaper.

With voilà eSIM, plans range from 1 to 50 GB, with no subscription and no contract. A few examples of prices checked on our website:

It's one of voilà eSIM's strengths: excellent value for money, with the final price shown before you buy, no hidden fees and no contract.

No, an eSIM isn't compatible with every device, whereas a SIM card is. You need a phone with an eSIM chip, which is the case for most smartphones from recent years.

• Apple: the iPhone XS, XS Max, XR and later models support eSIM, except most of those sold in mainland China, according to Apple Support.
• Google Pixel: every model from the Pixel 4 onward is compatible.
• Samsung Galaxy: most Galaxy S, Galaxy Z Flip and Galaxy Z Fold models are compatible, but not every entry-level model. Check the specs of your exact model.
• Other brands: some recent Xiaomi or Sony Xperia models also support eSIM, depending on the exact model and the market where it's sold.
• Watches and tablets: the Apple Watch, some Galaxy Watch models, other smartwatches and many tablets work with an eSIM.

Many people already have a compatible phone without knowing it. On an Apple phone, if the “Add eSIM” option appears on screen under “Cellular”, that's a good sign. To check your device, the full list is on our eSIM compatible devices page.

eSIM-only iPhones

Some iPhones no longer have a tray: they work with eSIM only. According to Apple:

• the iPhone Air and iPhone Duo don't have one, whatever country they're bought in;
• the iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, iPhone 18 Pro and iPhone 18 Pro Max don't have one when sold in the United States, Canada, Japan, Mexico and several Gulf countries;
• the iPhone 14, 15 and 16 sold in the United States don't have a tray either.

With one of these models, the choice is made for you: the eSIM is the only option. Our page on the iPhone Air and eSIM explains how it works.

There are two ways to get an eSIM: ask your usual mobile carrier for one for everyday use, or buy an international eSIM online for a trip. Either way, everything is done remotely or from an app, without going anywhere.

Local eSIMs

A local eSIM is sold by a mobile carrier at your destination. It can be worthwhile for a long stay, but you often have to buy it on site or on a website that isn't translated, sometimes with ID required. Not every carrier offers it to tourists: some still reserve eSIM for their subscribers.

International eSIMs

An international eSIM is ordered before you leave, from a specialized provider. It comes for a single destination, for a region such as Europe or Asia, or for the whole world. That's the case with voilà eSIM: you choose your destination in the app, you pay, and your eSIM is ready to install in a few minutes, with 24/7 human customer support if you need help.

To activate an eSIM, you need a compatible phone, an internet connection (Wi-Fi or mobile data) and the QR code or app that comes with your plan. Here's each step:

1. Sign up for an eSIM plan, or ask your provider to switch you to eSIM.
2. On iPhone, go to “Settings”, then “Cellular”, and tap “Add eSIM”. On Android, go to “Settings”, then “Network & internet” (or “Connections” on Samsung), and choose to add an eSIM.
3. Scan the QR code, or let your provider's app install the profile directly.
4. Give this new plan a name and choose which one is used for calls and which one for the internet.
5. If you're replacing your old card, your line switches over to the eSIM, then the old card is deactivated: you can take it out.

With voilà eSIM, installation takes two minutes from the app, which then lets you track your data in real time. All the details are in our article on how to install an eSIM.

No, you don't get better or worse signal with an eSIM than with a SIM card. Both only store your credentials: it's the phone's modem and antennas that pick up the network, and they're the same either way.

With the same carrier, coverage, speed and call quality are therefore identical, whether you're watching a video or browsing. If your connection changes when you switch from one to the other, the cause lies elsewhere:

• the partner network is different;
• 5G isn't included in your plan or isn't available where you are;
• you're inside a building, in a rural area or in a very crowded place;
• data roaming isn't turned on for your new eSIM.

On the ground, what matters most is the choice of network: voilà eSIM connects to the country's local networks, with 5G where available.

No, an eSIM doesn't use more battery than a classic SIM: the chip itself uses very little power, and it's the network connection that affects battery life, whatever the format.

What can make a difference is the number of active plans. With two lines on at the same time, your phone monitors two networks, which can slightly increase power use. If you don't need your usual plan during your trip, you can turn it off temporarily in the settings, without removing anything.

A weak network also wears down the battery: when the signal is poor, the phone boosts its power to stay connected, whether you're streaming video or browsing. Here again, the type of SIM makes no difference.

Yes, and it's often the best option: you keep your SIM card for your usual number, and you add a travel eSIM for the internet. Nothing to remove, nothing to change.

How to set up your phone for dual SIM:

• choose the eSIM for cellular data (on iPhone: “Settings”, then “Cellular”);
• keep your usual line for calls and texts, if you want to stay reachable;
• turn off data roaming on your usual plan, so it never uses data abroad;
• leave “Allow Cellular Data Switching” turned off on iPhone, otherwise your usual plan can take over and start roaming.

That's exactly what voilà eSIM offers: a data eSIM to add alongside your current plan, easy to manage from the app. To understand what uses up your data and how to track it, read our article on mobile data.

To make the right choice, check three things, in this order:

1. Does your phone support eSIM? If not, that settles it: physical SIM. If your phone no longer has a tray, it's the opposite: eSIM.
2. Do you often switch devices, or lend yours out? A physical SIM is still easier to move from one phone to another.
3. Are you traveling outside your plan's coverage area, or do you want to keep personal and work separate? An eSIM goes alongside your current SIM, with nothing to remove.

The first two points decide what you keep day to day. The third shows that the two options aren't mutually exclusive: most people are better off combining their usual SIM with an eSIM.

To choose between a SIM and an eSIM, start with your phone, then with how you use it.

For your main plan, the choice mostly depends on your offer and on how you switch phones. For a second plan, and especially for traveling abroad, an eSIM is almost always more convenient.

The answer changes depending on where you're going. To get the best connectivity at the best price:

• Within the area your plan covers: your usual plan may be enough. Check how much data is included each month before you leave.
• Outside that area, for a short or medium trip: a travel eSIM is the simplest option, and it works out cheaper than roaming charges.
• Several destinations on a single trip: a regional eSIM or the World eSIM, valid in 117 countries, saves you buying a local plan at every border.
• A long stay in one place, where you need a local number: a plan bought from local carriers can become worthwhile, as long as you're fine with the paperwork.
• A destination where buying locally is complicated: an eSIM spares you the paperwork and the language barrier.

So for most trips, the right answer is: your usual line for calls, and a cheaper travel eSIM for the internet. voilà eSIM covers more than 200 destinations, and travelers choose it for three reasons:

• excellent value for money, with a plan suited to your trip instead of an overpriced carrier pass;
• an eSIM that's easy to install in two minutes and an easy-to-use app to track your data in real time;
• 24/7 human customer support, reachable on WhatsApp wherever you are.