What is an eSIM and how does it work? Complete guide 2026
If you're planning a trip abroad, you've probably dealt with expensive roaming charges or the hassle of buying a local SIM card. eSIM technology completely simplifies this experience.
An eSIM (embedded SIM) is a digital SIM card integrated directly into your phone that allows you to connect to mobile networks without needing a physical card. Unlike traditional SIM cards that you need to insert into your phone, the eSIM is already built into your device and can be activated instantly by simply scanning a QR code.
In this complete guide, you'll discover exactly how eSIM technology works, what its advantages are, and how you can use it to stay connected while traveling, without roaming costs and without complications.
What is an eSIM?
eSIM stands for embedded SIM, meaning a SIM that's built in. It's a digital chip integrated directly into your phone's hardware that performs exactly the same functions as a physical SIM card - it allows you to connect to a mobile operator's network.
The major difference from traditional SIM cards is that an eSIM doesn't need to be physically inserted into your phone. All you need is to scan a QR code received from your operator or enter the activation details manually, and your phone will download the necessary profile to connect to the network.
eSIM technology has existed since 2016, but it's only in recent years that it has become mainstream, with the launch of iPhones and Android phones that support this technology. Today, most premium smartphones come with integrated eSIM support.
How does an eSIM work?
How an eSIM works is surprisingly simple, and activation takes just a few minutes:
- Purchase an eSIM plan - Choose a data plan suitable for your destination (for example, a beeSIM plan for Turkey, Greece, or any other country)
- Receive the QR code - After purchase, you instantly receive a unique QR code via email containing all the information needed for activation
- Scan the QR code - Access your phone's settings, go to the eSIM section, and scan the received QR code
- Install the eSIM profile - Your phone automatically downloads the digital profile from your chosen operator
- Activate the eSIM - Within seconds, you're connected to the mobile network in your destination
The entire process happens digitally, without needing a physical card, without going to a store, and without waiting. You can do everything from the comfort of your home before your trip, or even during your flight if you have onboard WiFi.
Once activated, the eSIM works exactly like a normal SIM card - you connect to 4G/5G internet, can receive calls (if the plan includes this service), and use all apps that require mobile data.
eSIM vs physical SIM - what are the differences?
While both technologies allow you to connect to mobile networks, there are some important differences between eSIM and physical SIM cards:
| Feature | eSIM | Physical SIM |
|---|---|---|
| Format | Digital, integrated in phone | Physical detachable card |
| Activation | Instant, by scanning QR code | Requires physical card and insertion |
| Time to obtain | Immediately (instant email) | Depends on delivery/store |
| Switching operators | Quick, without new card | Requires new card |
| Loss risk | Zero - it's digital | You can lose the physical card |
| Dual SIM | Can have multiple active profiles | Limited by physical slots |
The main advantage of eSIM is flexibility and speed. You can switch operators in minutes, have multiple plans active simultaneously (perfect for travelers who want to keep their home number active), and there's no risk of losing or damaging a physical card.
Why use eSIM while traveling?
If you travel abroad frequently, eSIM becomes an indispensable companion. Here are the main advantages:
1. Instant Activation, From Anywhere
No more searching for a SIM card store at the airport or negotiating in the local language. Buy your eSIM plan online, receive the QR code via email, and activate it in 5 minutes. You can do everything before leaving home, so you arrive at your destination already connected.
2. Transparent and Predictable Costs
With eSIM, you know exactly what you're paying before you leave. No surprises with roaming, no huge bills when you return. You pay a fixed amount for the data you need, that's it.
3. Keep Your Home Number Active
Most modern phones support Dual SIM - you can use your home SIM card (for calls and SMS) and the eSIM for internet simultaneously. You remain accessible on your usual number, but use the eSIM's internet to avoid roaming costs.
4. Coverage in Dozens of Countries
With regional or global plans, a single eSIM gives you coverage in 10, 20, or even 180+ countries. If you're traveling through Europe, you don't have to change cards at every border - one eSIM plan for Europe ensures continuous connectivity.
5. Enhanced Security
Being digital, the eSIM can't be physically stolen from your phone. Plus, if you lose your phone, you can remotely deactivate the eSIM without worrying about someone using your plan.
6. Sustainability
Without a physical plastic card and packaging, eSIM is the eco-friendly option for those who want to reduce waste while traveling.
What phones are compatible with eSIM?
eSIM technology is supported by most premium smartphones launched after 2018. Here's a list of the most popular compatible models:
iPhone (Apple)
- iPhone 15 Pro Max, 15 Pro, 15 Plus, 15
- iPhone 14 Pro Max, 14 Pro, 14 Plus, 14
- iPhone 13 Pro Max, 13 Pro, 13, 13 mini
- iPhone 12 Pro Max, 12 Pro, 12, 12 mini
- iPhone 11 Pro Max, 11 Pro, 11
- iPhone XS Max, XS, XR
- iPhone SE (2020, 2022)
Samsung Galaxy
- Samsung Galaxy S24 Ultra, S24+, S24
- Samsung Galaxy S23 Ultra, S23+, S23, S23 FE
- Samsung Galaxy S22 Ultra, S22+, S22
- Samsung Galaxy S21 Ultra, S21+, S21, S21 FE
- Samsung Galaxy S20 Ultra, S20+, S20
- Samsung Galaxy Z Fold 5, Z Fold 4, Z Fold 3
- Samsung Galaxy Z Flip 5, Z Flip 4, Z Flip 3
Google Pixel
- Google Pixel 8 Pro, 8, 8a
- Google Pixel 7 Pro, 7, 7a
- Google Pixel 6 Pro, 6, 6a
- Google Pixel 5, 5a
- Google Pixel 4, 4a, 4 XL
Other Brands
- Huawei P40, P40 Pro, Mate 40 Pro
- Oppo Find X3 Pro, Find X5 Pro, Reno 5A
- Motorola Razr (2019, 2020, 2022, 2023)
- Xiaomi 12T Pro, 13 Pro
How to check if your phone supports eSIM?
On iPhone: Settings → General → About → Digital SIM Available (or look for EID in the same section)
On Android: Settings → Connections → SIM Manager → Add mobile plan (if the option exists, your phone supports eSIM)
How to activate a beeSIM eSIM in 3 simple steps
Activating a beeSIM eSIM is quick and simple. Here's all you need to do:
Step 1: Choose the right plan
Visit beeSIM.ro and select your destination - whether you're going to Turkey, Greece, Italy, or any other country from 180+ available. Choose the plan that fits your needs (data amount and validity period).
Step 2: Receive the QR code instantly
After completing your order, you immediately receive the activation QR code via email along with clear instructions for your phone model. The process is instant - no waiting for deliveries or confirmations.
Step 3: Scan and activate
Open your phone's settings, access the eSIM/Digital SIM section, and scan the received QR code. Your phone automatically downloads the profile, and you're ready to go! The entire process takes under 5 minutes.
Recommendation: Activate your eSIM before leaving home while you have WiFi. This way, you arrive at your destination already connected and avoid any stress related to configuration.
Frequently asked questions about eSIM
Can I use eSIM and physical SIM card simultaneously?
Yes! Most modern phones support Dual SIM - you can use your home SIM card for calls/SMS and the eSIM for internet abroad.
Can I transfer my eSIM to another phone?
It depends on the operator. Some eSIM plans can be transferred by regenerating a new QR code, others are tied to a single device. With beeSIM, you can request transfer support if you change phones.
What happens if I run out of data?
You can buy a top-up or a new plan. Many eSIM plans allow you to add extra data instantly without losing your existing profile.
Does eSIM work for phone calls?
It depends on the plan. Some eSIM plans include calling minutes, but most are data-only (internet). However, you can use apps like WhatsApp, Telegram, or Skype for voice calls over the internet.
Is eSIM more expensive than physical SIM?
Not necessarily. Prices are comparable, and eSIM eliminates roaming costs that can be extremely high. In many cases, eSIM is the cheapest solution for internet abroad.
Can I use eSIM in my home country?
Yes, most operators offer eSIM support for their subscribers. You can request migration of your number to eSIM.
What happens to the eSIM when the validity period ends?
The eSIM profile remains on your phone but becomes inactive. You can either delete it or keep it for future use (if the operator allows recharging).
Ready to Try eSIM on your next trip?
eSIM is the future of mobile connectivity, especially for travelers. It offers flexibility, transparent costs, and a hassle-free experience - no more searching for SIM card stores, no surprises with roaming, and no being disconnected abroad.
With beeSIM, you have access to eSIM plans for over 180 countries, instant activation, and support in your language. Whether you're going for a week to Turkey or two months through Europe, we have the perfect plan for you.
Explore beeSIM plans and stay connected anywhere in the world: