In short: An eSIM card is a digital SIM embedded in your mobile that you can activate instantly, without needing a physical card. It's downloaded via the internet using a QR code, works just like a regular SIM, and is the most convenient solution for connecting to data when traveling abroad without paying abusive roaming fees.
What exactly is an eSIM card?
The eSIM card—whose full name is embedded SIM—is the digital evolution of the SIM card we all know. Instead of being a small plastic card with a chip that you insert into a phone slot, the eSIM is a chip soldered directly to the device's motherboard.
What's revolutionary isn't the hardware itself, but how it's programmed. While a physical SIM is locked to a specific carrier from the moment you buy it, an eSIM can be reprogrammed remotely for any compatible carrier. This means you can change providers, add a travel data plan, or manage multiple profiles without physically touching your phone.
The eSIM standard was defined by the GSMA (the global association of mobile operators) and began to reach consumers en masse from 2018, when Apple incorporated it into the iPhone XS. Today, virtually all mid-range and high-end smartphones include eSIM support.
Digital SIM, eSIM chip, or eSIM card? Are they the same?
Yes. The terms digital SIM, eSIM chip, eSIM card, and prepaid eSIM all refer to the same technology. The variation in name depends on the context: manufacturers speak of "eSIM", travelers often say "eSIM card" or "digital SIM", and travel data providers offer it as "prepaid eSIM" because you pay for a data package without long-term commitments.
In any case, the operation is identical: you receive a QR code (or a text activation code) that you scan with your mobile, and within minutes you have the plan active.
Differences between eSIM and physical SIM
To fully understand what eSIM offers, it's useful to compare it directly with traditional SIM in the aspects that matter most to the user:
| Feature | Physical SIM | eSIM |
|---|---|---|
| Format | Physical card (nano, micro, etc.) | Chip integrated into the device |
| Activation | Requires physical card + insertion | Online, via QR code or app |
| Activation time | Days (postal delivery) or hours (store) | Minutes (instant) |
| Carrier change | Needs new physical SIM | Remote change, no hardware |
| Simultaneous profiles | One per slot (max. 2 in dual SIM) | Up to 20 stored profiles |
| Risk of loss | High (small, removable card) | None (integrated into the mobile) |
| Compatibility | Universal across all mobiles | Mid/high-end smartphones from 2018 |
| Ideal for travel | Complicated (find local SIM at destination) | Perfect (activate before leaving) |
The conclusion is clear: eSIM does not entail any functional sacrifice compared to a physical SIM, and it offers very tangible advantages in flexibility, convenience, and security. The only real limitation is device compatibility, which is becoming less of an issue each year as manufacturers adopt the standard.
How does an eSIM card work for travel?
Using an eSIM when you travel is one of the most practical use cases for this technology. The usual process is as follows:
- You buy the plan online before leaving home, directly from your computer or mobile. You choose the destination, duration, and amount of data you need.
- You receive a QR code via email (usually within 5 minutes of purchase).
- You scan the QR from your phone's settings (Settings > Mobile Data > Add Data Plan on iOS; Settings > Connections > SIM Manager on Android).
- You configure the profile: you decide whether you want the eSIM to be your primary data line, or if you prefer to activate it only when you arrive at your destination.
- Upon arrival at your destination, your mobile automatically connects to the associated local operator's network, and you have data from the first moment, without queues, without stores, and without surprises on your bill.
The key point is that you can activate the plan before you leave. So, when you land or cross the border, you already have data available. If you've ever traveled and had to search for a local SIM card with jet lag and a dead battery, you know how valuable this is.
Does the eSIM replace your usual SIM?
Not necessarily. In current phones, the eSIM coexists with your regular operator's physical SIM (or with another eSIM, in dual eSIM devices). You can use your regular plan for calls and SMS, and the travel eSIM exclusively for data. This way you avoid roaming without losing your number.
For your next trip, check out our collection of eSIMs for Europe or our international eSIM with coverage in over 100 countries.
Advantages of using eSIM over travel SIM
Until recently, options for connecting abroad were few, and none were perfect: extremely expensive roaming with your usual carrier, a local SIM you bought blindly at the airport, or a portable WiFi router you had to charge and share. eSIM completely changes this landscape.
1. Total convenience: no waiting, no stores
You buy the plan from your couch at home, receive the QR in minutes, and activate it without needing to handle hardware. You don't have to look for a phone store upon arrival, you're not dependent on business hours, and you don't risk running out of data because the store was closed.
2. Very competitive price
Prepaid eSIM plans for travelers are significantly cheaper than traditional operators' roaming. For the price of one day of roaming with many European operators, you can have a week of data in Europe with an eSIM.
3. No risk of losing your usual SIM
One of the biggest fears when traveling is having to remove your SIM from your phone to insert a local SIM and then losing that tiny card. With an eSIM, you don't remove or change anything: your physical SIM stays where it is.
4. Real 4G/5G speeds
Modern travel eSIMs operate on 4G LTE networks and, in many destinations, 5G. Forget slow connections from low-quality networks: eSIM connects you to the best local operators in each country.
5. Immediate activation and remote management
If you need to add more data halfway through your trip because you've run out, you can top up or get a new plan from your mobile. No visiting any store. No talking to anyone on the phone.
6. Eco-friendly: no plastic
eSIM eliminates the need to produce, ship, and dispose of physical SIM cards. It's a small but real environmental benefit.
If you want to explore more about this technology, our guide on eSIM for your next trip covers all use cases in detail.
Which phones are compatible with eSIM?
eSIM compatibility has grown enormously in recent years. Below is a summary of the main manufacturers and compatible models:
Apple iPhone
- iPhone XS, XS Max, and XR (2018) — first iPhones with eSIM
- iPhone 11, 11 Pro, and 11 Pro Max
- iPhone SE (2nd generation, 2020 and 3rd generation, 2022)
- iPhone 12, 13, 14, and 15 (all variants)
- iPhone 16 (all variants)
Note: iPhone 14 and later models sold in the USA are eSIM-only (no physical SIM slot).
Samsung Galaxy
- Galaxy S20 and later series (S21, S22, S23, S24)
- Galaxy Z Fold and Z Flip (all generations)
- Galaxy Note 20 and Note 20 Ultra
- Galaxy A54 5G and recent mid-range A models
Google Pixel
- Pixel 3 and 3 XL (first Pixels with eSIM)
- Pixel 4, 5, 6, 7, and 8 (all variants)
- Pixel 9 (all variants)
Other manufacturers
- Motorola: Razr 2019 and later, recent Edge+ models
- OnePlus: Selected models since 2021
- Xiaomi: 13 and 14 series in some regions
- Huawei: P40 and Mate 40 (with limitations due to sanctions)
Important: eSIM compatibility may vary by region and exact model. Some mobiles sell different versions for different markets. Always consult the official manufacturer's specifications or our guide on eSIM compatible mobiles to verify your device.
How to check if your phone has eSIM?
The quickest way: go to Settings > General > About (on iPhone) or Settings > Connections > SIM Manager (on Android). If the option to add a data plan or an eSIM appears, your device is compatible. You can also dial *#06# on your phone's dial pad: if an EID (32-digit number) appears, you have eSIM.
How to buy and activate your eSIM card
The process of buying and activating an eSIM with PuraSim is simple and designed so that anyone can complete it in less than 10 minutes, even without technical experience.
Step 1: Choose your destination and plan
Browse our store and select your travel destination. We offer plans for eSIM for Europe (with coverage in over 35 European countries) and international eSIM plans for destinations in Asia, America, the Middle East, and more. Choose the amount of data and duration that best suits your trip.
Step 2: Complete the payment
The payment process is 100% online and secure. We accept credit/debit cards, PayPal, and other local methods. There are no hidden fees or long-term commitments: you pay once and that's it.
Step 3: Receive your QR code
After purchase, you will receive an email with your activation QR code within 5 minutes. Save that email: you will need it in the next step.
Step 4: Scan the QR and install the eSIM
Follow these steps depending on your device:
On iPhone (iOS 16 or higher):
- Go to Settings > Mobile Data > Add Data Plan
- Select "Use QR Code"
- Scan the QR you received via email
- Confirm the installation and name the plan (e.g., "PuraSim Europe")
On Android (Samsung, Pixel, etc.):
- Go to Settings > Connections > SIM Manager (or similar depending on the manufacturer)
- Select "Add mobile plan" or "Add eSIM"
- Choose "Scan carrier QR code"
- Scan the QR and confirm
Step 5: Configure mobile data
Once the eSIM is installed, configure your mobile to use that profile for data. Keep your usual SIM for calls and SMS if you wish. Activate data roaming on the eSIM profile (this is necessary even though it doesn't change the price: the plan already includes international data).
Need more details? Check out our step-by-step tutorial on how to install an eSIM, with screenshots for the most popular devices.
Tips before activating
- Make sure you have a stable WiFi connection when scanning the QR.
- The QR code can only be used once: do not share the email.
- You can install the eSIM at home and activate it only when you arrive at your destination.
- If you have any questions, our support team responds in less than 2 hours.
Frequently Asked Questions about eSIM cards
What is an eSIM card?
An eSIM (embedded SIM) card is a digital SIM integrated directly into your device's hardware. Unlike traditional physical SIMs, you don't need to insert any card: the operator's profile is downloaded remotely via a QR code or an app.
Are all mobiles compatible with eSIM?
Not all mobiles are compatible. eSIM technology is available on iPhone XS and later models, on most Samsung Galaxy phones since 2019, and on Google Pixel phones from the Pixel 3. More recent models are usually compatible, but it's always advisable to check the manufacturer's specifications before buying.
Can an eSIM be used in any country?
It depends on the plan you purchase. There are local eSIMs (valid in a single country), regional eSIMs (for an area like Europe), and global eSIMs (covering dozens of countries). At PuraSim, we offer plans for Europe and international destinations covering more than 100 countries.
How many eSIMs can a mobile phone have at the same time?
Most compatible smartphones can store between 5 and 20 eSIM profiles, although generally only one or two can be active simultaneously. This allows you to have your usual operator SIM and a travel eSIM active at the same time, using each for whatever you need.
Is it safe to buy an eSIM online?
Yes, as long as you buy it from a trusted provider. eSIMs are activated using industry-standard encryption (RSP/eIM protocol), and the personal data shared is minimal: there is no need to register the IMEI or send documentation. At PuraSim, the process is 100% online and secure.
Conclusion: eSIM is the smartest way to connect when you travel
The eSIM card has transformed the way we manage connectivity abroad. Forget queues at phone stores, losing your regular SIM, or paying exorbitant roaming bills. With an eSIM activated before you leave, you'll arrive at your destination connected from the first minute.
At PuraSim, we have been helping travelers connect for years in a simple, economical, and surprise-free way. Our plans are designed to work in the countries most visited by Spanish speakers, with high-speed data and real support in Spanish.
Ready to travel connected? Explore our eSIM for Europe or our international eSIM and find the perfect plan for your next trip.
