What Is an eSIM?

eSIM stands for embedded SIM and functions as a digital version of a SIM card embedded in your device. Unlike physical SIM cards, eSIMs offer greater flexibility, allowing you to switch between carriers seamlessly without swapping out SIM cards. They enable you to stay connected anywhere, anytime, on (most) flagship devices.

Why is eSIM a game changer for travellers? With an eSIM, you never have to visit a shop or buy a physical SIM card at your destination. Whether you’re hopping between countries or need a backup data plan, eSIM makes staying connected effortless. As long as your phone is compatible, you’re good to go.

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eSIM Explained (Technical)

An eSIM is a significant advancement in mobile connectivity, replacing the need for a traditional, removable SIM card. Unlike physical SIM cards that require manual insertion and swapping, an eSIM is integrated directly into a device’s circuit board. It adheres to the eUICC (embedded Universal Integrated Circuit Card) standard, allowing for secure remote provisioning and managing carrier profiles.

One of the standout advantages of eSIM technology is its ability to be reprogrammed remotely via software. Users can switch mobile network operators or change phone numbers without physically replacing a SIM card. With an eSIM, you can store and manage multiple profiles on a single device, making it exceptionally convenient for travellers, business users, and individuals managing multiple numbers. Whether you need a local data plan while abroad or want to separate personal and work lines, eSIM simplifies the process.

Beyond smartphones, eSIM technology is transforming connectivity across various industries. It is now widely used in tablets, smartwatches, laptops, connected vehicles, and Internet of Things (IoT) devices. Applications range from GPS trackers, smart home systems, and AI translators to industrial solutions like smart meters and remote monitoring devices. As eSIM adoption continues to grow, it plays a crucial role in integrating technology into everyday life, enabling more efficient, scalable, and flexible mobile connectivity.

What is the Difference: eSIM vs. Physical SIM

If you're considering switching from a physical SIM to an eSIM, you might be wondering about the key differences between the two. Below is a comparison to help you understand their advantages and limitations:

Phone Numbers

• eSIM: Supports multiple phone numbers on a single device.
• Physical SIM: Typically supports only one number per SIM card.

Network Operators

• eSIM: Not tied to a single carrier; allows switching between providers digitally.
• Physical SIM: Locked to a specific carrier unless the device is unlocked.

Removal

• eSIM: Embedded in the device and cannot be physically removed.
• Physical SIM: Can be removed and swapped between devices.

Activation

• eSIM: Activated digitally via software — no need for physical handling.
• Physical SIM: Requires manual insertion and activation through a carrier.

Carrier Switching

• eSIM: Allows remote network switching without changing SIM cards.
• Physical SIM: Requires swapping out the SIM card to switch carriers.

Multiple Profiles

• eSIM: Can store multiple carrier profiles on one device — useful for travelers and business users.
• Physical SIM: Supports only one profile per SIM; dual SIM slots required for multiple numbers.

Device Compatibility

• eSIM: Available on newer flagship devices (iPhones, Samsung Galaxy, Google Pixel, etc.).
• Physical SIM: Compatible with most mobile phones, including older models.

If you are wondering whether an eSIM impacts data speed, or how the signal strength of eSIMs performs against a physical SIM, the short answer is that there is no inherent difference in performance between an eSIM and a physical SIM. Using an eSIM does not give you faster or stronger signals; but neither is it slower or weaker.

Benefits of Using eSIM for International Travel

Travelling abroad comes with the challenge of staying connected without incurring excessive roaming charges or dealing with the hassle of buying local SIM cards. eSIM technology simplifies international travel by offering affordable, flexible, and seamless connectivity. Here’s why an eSIM is a game-changer for travellers:

1. Cost-effective data plans

eSIMs provide competitive data plans at lower prices compared to traditional roaming. Instead of relying on expensive carrier roaming rates, travellers can purchase affordable local or regional eSIM plans tailored for their destination. This ensures significant savings while maintaining reliable high-speed internet access abroad.

2. Convenience & seamless activation

Gone are the days of searching for local SIM cards at foreign kiosks or dealing with SIM tray ejectors mid-journey. With an eSIM:

• Instant activation: Purchase and install an eSIM before you even land.
• No physical handling: No need to swap SIM cards or worry about losing them.
• Hassle-free switching: Easily switch between plans via your phone’s settings without inserting a new SIM.

3. Flexibility across multiple countries

Many eSIM providers offer regional or global plans, allowing seamless connectivity across multiple countries without changing SIM cards. This is especially useful for multi-country travellers, digital nomads, or those frequently moving between destinations.

4. Dual SIM functionality

eSIM-enabled devices allow users to keep their primary SIM active while using an eSIM for travel data. This means:

• You can still receive calls and texts on your primary number while using the eSIM for data.
• There’s no need to disrupt your home network services while abroad.

5. Enhanced security

Unlike physical SIM cards, an eSIM cannot be lost, stolen, or removed from your device. This reduces the risk of SIM card theft or unauthorized use, ensuring a safer and more secure mobile experience while travelling.

What are the Prerequisites for Using an eSIM

eSIM compatible devices

One of the critical prerequisites for using an eSIM is owning an eSIM compatible device. If you own a 2020 or later flagship phone from any one of the big smartphone manufacturers (Apple, Samsung, Google), chances are your device supports eSIM. Of course, if you are purchasing the latest flagship models, eSIM compatibility is almost guaranteed.

In fact, the list of models is too long to include here, but here are some examples: iPhone XR or later, Samsung Galaxy S20 or later, Samsung Galaxy Z series, and Google Pixel 3 or later all support eSIM.

There is a common misperception that eSIMs are only used in iPhones, and that Android devices do not fully support eSIMs. While it is true that all the latest iPhone models are eSIM compatible, many Android devices also support eSIM. In fact, the number of eSIM-compatible Android devices has been steadily increasing over the past few years, and this trend is expected to continue as smartphone manufacturers release new models.

Operator support for eSIM

Simply owning an eSIM-compatible phone does not necessarily mean you can use an eSIM. The second key requirement is that your network operator must offer eSIM support for your specific device model. For example, if your operator provides eSIM support for an iPhone 14, it does not automatically mean you can use an eSIM on a Xiaomi 13 device with the same provider.

That said, eSIM technology is operator-agnostic, location-agnostic, and device-agnostic. In other words, if your current provider does not support eSIM for your device, it simply means you cannot use their eSIM service — but you can still activate an eSIM from another provider that does support it.

If your primary reason for using an eSIM is international travel, there’s usually no need to worry about local operators lacking eSIM support for your device. While some network providers may not offer tourist eSIMs, many companies specialise in travel eSIMs designed specifically for international travellers. These operator-agnostic eSIMs allow you to stay connected as long as your device supports eSIM functionality.

How to Use an eSIM?

Installing an eSIM is quick and hassle-free. Whether you're using an iPhone, Android device, or setting up via QR code or manual installation, follow these simple steps to get connected in minutes.

Automatic eSIM Installation (Recommended for iOS devices)

• Open the Sooty iOS app.
• Go to Manage eSIM.
• Select the eSIM you want to install.
• Tap “Installation Instructions” → “Add Automatically”.
• Choose “Install eSIM Now” and follow the on-screen instructions.

Manually Setting up eSIM on iPhone

• Go to Settings → Mobile Data → Add eSIM.
• Choose “Use QR Code” or “Enter Details Manually” (if provided by your carrier).
• Scan the QR code or enter the activation details.
• Follow the on-screen instructions to install and activate the eSIM.
• Enable the eSIM profile and select it as your primary or secondary data line.

Manually Setting up eSIM on Android

• Go to Settings → Network & Internet → SIMs → Add Mobile Plan.
• Select “Download a SIM Instead” or “Use QR Code”.
• Scan the QR code provided by your eSIM provider.
• If prompted, confirm installation and activate the eSIM.
• Set the eSIM as your primary or secondary mobile data plan.

Pro Tip: Activate Before You Travel!

For a seamless travel experience, install your eSIM before departure and activate it upon arrival. This ensures you’re connected as soon as you land!

Debunking eSIM Myths

eSIM technology has been around since 2016 but only started gaining significant traction in 2018. Given its increasing adoption, several misconceptions have emerged over time. As strong advocates of eSIM’s flexibility and convenience, we’re here to debunk some of the most common myths surrounding it.

Myth 1 – eSIMs are Expensive

Contrary to popular belief, eSIMs are designed to be cost-effective, not expensive. At Sooty, our goal is to get you connected quickly and affordably, no matter where you are in the world. Since eSIMs are distributed digitally, they eliminate production and logistics costs associated with physical SIM cards. This means lower prices for consumers, as the primary costs come from backend telecom infrastructure rather than distribution.

And it’s not just us — most eSIM providers offer competitive data plans in many countries. For instance, in Mexico, eSIM plans can be very affordable, often matching or even beating local SIM card prices — without the hassle of physically swapping cards.

Myth 2 – eSIM is mainly for B2B/IoT/“connected everything”

Some assume that eSIM technology is primarily for business (B2B), IoT devices, and enterprise solutions. While it’s true that eSIMs are widely used in connected vehicles, drones, smart appliances, and smart city infrastructure, their impact in the consumer space is rapidly growing.

eSIM technology is powering billions of IoT devices across industries, from smart cities to connected vehicles. At the same time, consumer adoption has surged, with more smartphones, tablets, and wearables supporting eSIM than ever before. As seen with Myth #1, eSIM’s affordability and convenience continue to make it a go-to choice for everyday users — particularly travelers who rely on seamless global connectivity.