What is an eSIM and what is different about it on the iPhone?
An eSIM is a digital SIM card integrated into the phone itself: instead of inserting a physical card, you download a profile from your carrier or provider and activate it from the phone's settings. On the iPhone, it works the same as on other compatible phones, with the advantage of saving multiple profiles and switching between them without opening any trays.
Think of an eSIM as the equivalent of installing an app, but for your phone line. The chip is already soldered inside the iPhone from the factory; what changes with each new line is only the information stored there: your number, your data plan, and the carrier you connect to. That's why when you buy an eSIM for travel, you don't receive anything by mail: you receive a QR code or a link that the iPhone reads and converts into an active line in a couple of minutes.
If you've never heard of this, it's not a recent invention or exclusive to Apple: most mid-range and high-end phone brands already include it. But the iPhone was one of the first to popularize it, and for several generations it has used it as a key piece for traveling without relying on buying a physical chip in each country. If you want to start from scratch with the concept, the guide what is an eSIM explains it without assuming you already know what it's about.
How does eSIM work on iPhone?
The iPhone connects to the cellular network with an eSIM profile exactly as it would with a physical SIM: it searches for a signal, registers with the carrier, and provides data, calls, and messages according to the plan you've contracted. The difference is in how that profile gets to the phone, not in how it works once installed.
The typical process is like this: you buy an eSIM data plan, the provider gives you a QR code (or a direct link if you're buying from the same iPhone), and from Settings > Cellular > Add eSIM the phone scans that code and downloads the profile. From then on, that line appears in the list of available plans, with its own name, and you can decide whether to use it as a primary line, as a data line, or leave it in the background until you need it.
Once installed, the iPhone doesn't distinguish between an eSIM and a physical SIM for any day-to-day operations: notifications, signal icon, network selection, or switching between 4G and 5G all work the same. The only distinct management occurs when installing, deleting, or switching between profiles, which you can see in more detail in how to install an eSIM.
Which iPhone models have eSIM?
Apple introduced eSIM compatibility starting with the iPhone XS, XS Max, and XR models, launched in 2018, and has maintained it in all subsequent generations. From the iPhone 14 onwards, models sold in the United States no longer include a physical SIM tray: they operate exclusively with eSIM. In other markets, including Latin America, most recent models offer both options, although this may vary depending on the country where the device was purchased.
| Model Range | Does it have eSIM? | Does it also have a physical tray? |
|---|---|---|
| iPhone XS / XS Max / XR and older | No | Yes (sole option) |
| iPhone XS / XS Max / XR up to iPhone 13 | Yes | Yes, in most markets |
| iPhone 14 onwards (models sold in the US) | Yes | No, eSIM only |
| iPhone 14 onwards (models sold outside the US) | Yes | Yes, depending on the country of purchase |
If you have doubts about your particular device, the quickest way is to check it directly from the phone: go to Settings > General > About and look for a section called "EID" or "Digital SIM". If it appears, your iPhone supports eSIM. For a complete list model by model, you can consult which iPhone models support eSIM.
Which is better, physical SIM or eSIM?
Neither is "better" in the abstract: it depends on what you need at any given moment. For your usual line, the one you use every day in your country, the difference is almost irrelevant because both provide the same service. Where eSIM has a real advantage is in specific situations, such as traveling, where changing lines without going to a physical store solves a concrete problem.
The physical SIM still wins on one point: if your phone breaks down or runs out of battery and you need to move your line to another phone immediately, you just have to take out the card and put it in the other device. With an eSIM, that transfer is also possible, but it requires additional steps and, in some cases, contacting the carrier. The eSIM, on the other hand, wins in convenience for carrying several lines on the same phone without carrying physical cards or risking losing them.
The question is not which technology is superior, but which one better solves what you are doing at that moment: for your fixed everyday line, it almost doesn't matter; for a week-long trip, the eSIM avoids queues, lost cards, and relying on finding an open store when you get off the plane.
If you want to delve deeper into this comparison with more technical detail, the guide eSIM vs. physical SIM discusses each point separately.
How to install an eSIM on your iPhone before traveling
A concrete example helps more than a general explanation. Imagine you live in Mexico City and in three weeks you are traveling to Bogotá for five days, for work. You don't want to depend on the hotel Wi-Fi for everything, but you also don't want to activate international roaming on your Mexican line or look for a chip store when you arrive at the airport with your luggage in tow.
What you would do is this: a few days before the trip, with your iPhone connected to Wi-Fi at home, you buy a data eSIM for Colombia. You receive a QR code by email. You go to Settings > Cellular > Add eSIM, scan the code, and the profile is installed, but not yet activated. Your Mexican line remains the primary for calls and messages; the new eSIM is ready, waiting.
The day you land in Bogotá, you go to Settings > Cellular, activate the new line, and select it as your data line. In seconds you have internet working, without having set foot in a store or waited in line. Your Mexican number still receives calls and WhatsApp normally, because that message travels over data, not over the cellular voice network. When you return to Mexico, you simply deactivate or delete the travel eSIM profile, and everything returns to normal.
Which company has eSIM in Mexico?
Major Mexican carriers—Telcel, AT&T Mexico, and Movistar Mexico—already offer eSIM for local lines, meaning for daily use within the country. This solves your everyday line problem, but not necessarily the problem of traveling abroad: if you leave Mexico, that local line usually depends on roaming agreements with the destination country, which can be limited or nonexistent for certain plans.
For traveling outside Mexico (or for any traveler from Colombia, Argentina, Chile, or Peru leaving their country), the alternative is an international eSIM specifically designed for temporary use at the destination, independent of your local carrier. This is a different category than your usual line: it doesn't replace your number, it just provides mobile data in the country you're in, with a plan by day or by gigabyte depending on your needs.
What are the disadvantages of eSIM?
eSIM isn't perfect, and it's worth knowing its limitations before relying on it for a trip:
- Not all phones support it. If your iPhone is older than the XS, or if it's a carrier-locked model that restricts eSIM, you simply won't be able to use it.
- Switching phones is less immediate. With a physical SIM, you move the card and you're done. With an eSIM, if you switch phones, you need to reinstall the profile, and not all providers allow unlimited transfers.
- A factory reset without backup can erase the profile. If you do a complete iPhone reset without having saved or reinstalled the eSIM afterwards, the line stops working and needs to be reinstalled from scratch (if the provider allows it).
- It requires Wi-Fi or data to install. The QR code can be scanned offline, but downloading the profile requires internet at that moment, so it's best to install it before leaving home, not at the airport without Wi-Fi.
- Some devices limit how many eSIMs you can save or use actively at once. You can store several, but only a limited number can be active simultaneously depending on the model.
None of these points make it a bad idea for travel; it's simply good to know them beforehand. If you've had a specific issue with an eSIM not starting or not finding a network, the guide to common eSIM problems reviews the most frequent causes and how to solve them.
eSIM and roaming: are they the same thing?
No, and it's a common confusion. Roaming is a service: your usual carrier allows you to use your line in another country, typically with an additional cost or a special package that you activate before traveling. eSIM is a technology: the way that line profile—whether from your local carrier or an international provider—is installed on your phone.
In other words: you can have roaming activated on a traditional physical SIM, and you can also have roaming on an eSIM. And you can use an international eSIM from a provider without touching your local line's roaming at all, because they are two completely separate lines within the same iPhone. For a traveler, an international eSIM is usually more practical than your local carrier's roaming, because the plan and cost are defined before you leave, instead of depending on rates that often aren't clear until the bill arrives.
| Criterion | Local carrier roaming | International travel eSIM |
|---|---|---|
| When do you know the cost? | Sometimes only with the bill, depending on the carrier and country | Before leaving: you pay for the plan when you buy it |
| Your usual number | It is maintained, it is the same line | It is maintained separately, on a second line of the same iPhone |
| Installation | No requirements, activated from carrier settings | Requires scanning a QR code before or upon arrival |
| Coverage per country | Depends on your carrier's agreements with each destination | Depends on the eSIM provider and the destinations it covers |
You can compare both options in more detail in eSIM vs. roaming, and if you prefer to continue using your carrier's roaming, that process has its own steps and configurations to consider before traveling.
Dual eSIM on iPhone: two lines at the same time
For several generations, the iPhone has allowed you to have more than one line profile installed and use two simultaneously (one as the main voice line and the other as a data line, or both active depending on the model). This is exactly what you take advantage of when you travel: you don't have to choose between your usual number and a local data line; you can have both working at the same time, each doing a different job.
A detail that almost no one checks, and that avoids many headaches on a trip: in Settings > Cellular, you can separately configure which line uses "Cellular Data" and which uses "iMessage & FaceTime". If you leave your usual line as the default for iMessage and FaceTime, but only switch data to the travel eSIM, you continue to receive your WhatsApp or FaceTime messages and calls without interruption, even if your local line's data roaming is completely off. This is a setting that is done only once and completely resolves the fear of "being out of touch" while using a different eSIM for browsing.
Frequently Asked Questions
Do I need Wi-Fi to install an eSIM on my iPhone?
Yes, to download the profile you need an internet connection, either Wi-Fi or mobile data from another line. That's why it's advisable to install it before you travel, when you still have Wi-Fi at home, and only activate it once you arrive at your destination.
Can I use two eSIMs at the same time on an iPhone?
Yes, most compatible models allow you to store multiple eSIM profiles and have more than one active at a time, for example, one line for calls and another for data. The exact limit of simultaneously active profiles depends on the iPhone model.
Can an eSIM be transferred from one iPhone to another?
In some cases, yes, but it's not as straightforward as moving a physical card. It depends on whether the eSIM provider allows reinstalling the profile on another device, and usually you have to request it or generate a new code.
Does eSIM work as well as a physical SIM for browsing?
Yes, once installed there is no difference in signal quality, data speed, or coverage: performance depends on the carrier's network, not whether the line is physical or digital.
What happens if I lose my iPhone with an eSIM installed?
The eSIM is tied to the phone, so you can't physically "remove" it as you would with a card. If the iPhone is lost or stolen, you must contact your carrier or provider to deactivate that line from their system, just as you would with any lost line.
How long does it take for an eSIM to activate?
It depends on the provider, but many travel eSIMs are active in approximately 1 minute after scanning the QR code, provided an internet connection is available at that moment.
Is eSIM for calls or data only?
It can be for both, but it depends on the plan you contract. Many eSIMs designed for travelers only include mobile data, because today most calls and messages are made via WhatsApp, FaceTime, or similar apps, which work with data.
Should you use an eSIM on your next trip?
If you have a compatible iPhone (XS onwards) and are traveling abroad, eSIM solves a real problem: arriving with working internet from the first minute, without looking for a chip store or relying on your local carrier's roaming. You buy it before you leave, install it with Wi-Fi at home, and activate it upon landing, exactly as in the example of the trip to Bogotá we saw above.
At PuraSIM, travel eSIMs cover more than 200 destinations, activate in approximately 1 minute once you arrive, and you have 180 days from purchase to activate them when it suits you, so you can buy it in advance without rushing. If something doesn't work as expected, 24/7 support is available in all languages via email and WhatsApp, not just during office hours. To start, the best starting point is the guide to first steps to activate your eSIM on iPhone, and from there you can check the available plans based on where you are traveling in the international eSIM collection.
