What is an eSIM, and How Does It Work?

Discover everything you need to know about eSIMs, from what they are to their benefits and how to set one up on your device.

An eSIM, short for embedded SIM, is a revolutionary technology that eliminates the need for a physical SIM card. Instead, it’s a tiny chip built directly into your phone, enabling seamless connectivity without the hassle of inserting or swapping SIM cards. Travelers love eSIMs for their simplicity, speed, and convenience, making them an ideal solution for international trips.

In this guide, we’ll explain how eSIMs work, why they’re game-changing, and how to get started with one.

What is an eSIM, and How Does It Work?

An eSIM is a virtual SIM card stored digitally on your phone. Unlike traditional SIM cards, it doesn’t require a physical chip that you insert into your device. Instead, the embedded chip in your phone holds all the essential information, which can be activated through software.

Once activated, an eSIM functions just like a standard SIM card, giving you access to mobile data, voice calls, and text messaging. Many modern phones even allow you to store multiple eSIM profiles, letting you switch between networks or plans with ease. For travelers, this means no more hunting for local SIM cards - simply purchase a travel eSIM online and activate it in minutes.

Using an eSIM Abroad: How Calls and Texts Work

It’s important to note that many travel eSIMs are data-only. This means you can use internet-based apps like WhatsApp, iMessage, Facebook Messenger, or Skype to keep in touch via calls and messages over data - no need for a traditional phone number. If you still need to receive regular calls or SMS texts on your main number while abroad, you can often keep your physical SIM card in your phone alongside the eSIM. This allows you to use your home network for calls and texts (though be aware that your provider may charge roaming fees) and rely on the eSIM for affordable local data.

This dual setup is perfect for frequent flyers and digital nomads who want seamless connectivity without juggling multiple SIM cards or missing important messages.

eSIM vs. Traditional SIM Cards: Key Differences

The biggest distinction between an eSIM and a physical SIM is where the technology resides. While physical SIM cards are removable chips, an eSIM is embedded directly into your device and managed via software.

Here are some standout differences:

• Device Compatibility: eSIMs require newer phones with built-in support, while older models only work with physical SIM cards. For example, US versions of the iPhone 14 and later rely exclusively on eSIM technology, without any physical SIM slots.

• Convenience: With eSIMs, there’s no need to swap cards when changing providers or plans. Everything is done digitally.

• Durability: eSIMs can’t be damaged, lost, or misplaced like physical SIM cards.

Why Use an eSIM?

The advantages of eSIMs are compelling, particularly for frequent travelers or those seeking a hassle-free experience. Here’s why you might want to make the switch:

• Instant Activation: Buy an eSIM online and activate it in minutes—no waiting for a physical SIM to arrive.

• Multi-Country Coverage: Enjoy connectivity across several countries with a single regional or global plan, perfect for international trips.

• Dual SIM Functionality: Use an eSIM alongside your regular SIM card for seamless network switching or keeping two numbers on one device.

• Lost? Not Likely: Digital eSIMs eliminate the risk of losing tiny plastic cards.

• Cost Efficiency: eSIMs often offer better value than expensive roaming packages or renting WiFi devices. By activating an eSIM with a travel-specific data bundle before you leave, you can connect as soon as you arrive at your destination - no need to hunt down physical SIM cards or pay sky-high roaming fees. Switching carriers or plans is handled entirely through software, so you can easily select the best rates for each country without the hassle of managing tiny plastic cards. For travelers, this means seamless, affordable connectivity wherever you go.

• Eco-Friendly: By ditching plastic, eSIMs reduce waste and are kinder to the environment.

Which Devices Support eSIMs?

Most newer phones support eSIM technology, including:

• iPhones: From the iPhone XR onwards.

• Samsung Galaxy: Models from the S20 series upwards.

• Other Brands: Numerous Android devices and some laptops, tablets, and smartwatches now come eSIM-ready.

To check compatibility of your phone, dial *#06# on your handset. If an EID serial number is presented, your phone supports eSIM.

Still unsure? Check our eSIM device compatibility page.

How to Get an eSIM

Acquiring an eSIM is straightforward, but the process can vary slightly depending on whether you’re choosing a domestic or international provider.

1. For Everyday Use (Local Providers)

If you want to replace your physical SIM card with an eSIM for daily use, contact your local carrier. Providers like O2, Vodafone, or T-Mobile often require you to visit a store or request the switch online. While some carriers may lag behind in offering eSIMs, most leading networks now support them.

2. For Travel (International Providers)

For travel, eSIM providers like Simovo offer a wide range of prepaid plans tailored for tourists and digital nomads. These plans provide reliable coverage by connecting to local networks wherever you go.

At Simovo, getting an eSIM is effortless:

• Select a data plan that suits your needs.
• Receive the activation details instantly via email.
• Follow the instructions to activate your eSIM in minutes.

How to Activate an eSIM

Once you’ve purchased your eSIM, activating it is quick and easy. Follow these steps for your device:

For iOS Devices (iPhone)

1. Open Settings.
2. Tap Cellular or Mobile Service.
3. Select Add eSIM.
4. Choose Use QR Code and scan the code you received.
5. Follow the prompts to complete activation.

For Android Devices

1. Go to Settings.
2. Open the Connections menu.
3. Select SIM Manager.
4. Tap Add eSIM and scan your QR code.
5. Complete the setup by following the prompts.

Within minutes, your eSIM will be active and ready for use, giving you instant access to data, calls, and texts.

What If Your Phone with an eSIM Gets Lost or Stolen?

Losing your phone is stressful, but if you're using an eSIM, there's no need to panic. Most providers, including SIMOVO , can remotely deactivate your eSIM to secure your account and data. If your device goes missing, contact your mobile provider promptly - they'll suspend your eSIM to help prevent unauthorized use.

This quick response protects your information, and in many cases, your eSIM plan can be transferred to a replacement device once you're ready. As always, it's wise to enable any built-in security features, like Find My iPhone or Google Find My Device, to further safeguard your phone and personal information.

Using Internet-Based Apps with an eSIM

Because most travel eSIM plans are data-only, you won’t get a traditional phone number for calls and SMS. But don’t worry—staying in touch is just as easy (if not easier). With an active eSIM, you can use internet-based services like WhatsApp, Facebook Messenger, Telegram or iMessage to make calls and send messages over data.

This approach is a favorite for international travelers, as these apps let you communicate seamlessly with family and friends—no extra SIM card required. Just connect to the internet through your eSIM, open your app of choice, and you’re ready to chat, call, or even video call wherever you are in the world.

Stay Connected with Simovo

eSIMs are the future of mobile connectivity. Whether you’re planning a trip abroad or looking for a convenient everyday solution, Simovo makes it easy to get connected without the fuss.

Browse our wide range of eSIM plans and join the thousands of travelers and adventurers already enjoying the benefits of this cutting-edge technology.