The ongoing evolution of technology has revolutionised how we interact with our devices, transforming our everyday experiences. Among the most significant advancements is the emergence of eSIM technology, which introduced a new way of connectivity and convenience and is gradually replacing traditional physical SIM cards. 

According to Grand View Research, the global eSIM market was valued at USD 8.07 billion in 2022 and is projected to grow at a compound annual growth rate (CAGR) of 7.9% from 2023 to 2030. Data from Mobilise highlights the rapid adoption of eSIM-enabled devices: from 1.2 billion in 2021, this number is expected to skyrocket to 3.4 billion by 2025. Such growth reflects the growing significance and underlines the importance of understanding eSIM technology and its implications. 

So, if you’re unsure of what an eSIM is or how it works, you’re in the right place. This blog will cover all the basics of an eSIM, including what it is, how it’s different from a physical SIM card, and how it works. We’ll also cover its advantages and why now is the perfect time to consider switching to eSIM-enabled devices. 

What is an eSIM?

An eSIM, short for embedded SIM, is a digital SIM card that is embedded directly into a device, such as a smartphone or smartwatch. It enables connectivity to mobile networks without the need for a removable card, offering unmatched convenience and flexibility. 

Unlike physical SIM cards that require a slot and manual swapping when switching carriers, eSIMs operate digitally. In fact, one of the biggest differences between an eSIM and a physical SIM card is that eSIMs can be activated digitally anytime, anywhere, unlike physical SIM card, which generally requires visiting a store or kiosk. You can switch carriers or plans by simply downloading a new profile to your device.

This also means eSIMs enable you to manage multiple plans on a single device effortlessly. For example, you can maintain work and personal numbers on the same phone or activate a temporary local plan while travelling without losing access to your primary number. This flexibility makes staying connected more convenient than ever, especially when travelling abroad.

How does an eSIM work?

An eSIM, short for embedded SIM, works differently from a traditional SIM card, as it is built directly into your device's hardware. Instead of physically swapping SIM cards to connect to a network or switch carriers, an eSIM uses software-based profiles to store your carrier details. This programmable technology allows the device to download and store multiple carrier profiles, though typically, only one can be active at a time. The eSIM communicates with mobile networks using the same cellular technology as physical SIMs, ensuring seamless connectivity.

When you set up an eSIM, your device communicates with the carrier’s server to download the eSIM profile. This profile includes all the necessary information, such as your phone number and network configurations. The process leverages remote provisioning, meaning you can activate or switch networks without requiring a visit to a store or the hassle of handling a physical SIM card.

How to activate an eSIM?

Activating an eSIM on iPhones

Apple has been a pioneer in adopting eSIM technology, starting with the iPhone XS, XR, and later models. Activating an eSIM on an iPhone involves several methods, depending on your carrier’s approach:

Using a QR Code:

1. Contact your carrier to buy a plan and obtain an eSIM activation QR code.

2. On your iPhone, navigate to Settings > Mobile Services > Add eSIM.

3. Under ‘Set Up Mobile Service,’ click on ‘Use QR Code.’ 

4. Use your phone’s camera to scan the QR code provided by your carrier.

5. Follow the on-screen instructions to complete the setup. Once activated, your eSIM profile will be ready for use.

Manual Activation via Code:

1. If your carrier provides an activation code instead of a QR code, navigate to Settings > Mobile Services > Add eSIM.

2. Under ‘Set Up Mobile Service,’ click on ‘Use QR Code.’ 

3. On the displayed screen, click ‘Enter Details Manually’ given at the bottom. 

4. Input the requested details, like the activation code and address provided by your carrier.

5. Your iPhone will configure the eSIM profile, completing the activation process.

Using a Carrier App:

1. Download your carrier’s app from the App Store, such as Saily or aloSIM.

2. Open the app and sign in with your carrier account.

3. Look for an option to activate or set up an eSIM.

4. Follow the app’s instructions to download and activate your eSIM profile.

Additionally, if you’re switching to a new iPhone, you can transfer an eSIM directly. During the setup process, select Transfer eSIM from your old device, ensure both devices are nearby and follow the prompts to complete the transfer.

Activating an eSIM on Android Phones

Many Android devices, including Google Pixel, Samsung Galaxy, and newer models from other manufacturers, support eSIM functionality. The activation process varies slightly by device type:

Using a QR Code:

1. Upon buying a plan, your carrier will mail an activation QR code.

2. On your Android phone, go to Settings > Network & Internet > SIMs > Add eSIM (may vary depending on your phone model).

3. Scan the QR code using your device’s camera.

4. Follow the on-screen prompts to download and activate the eSIM profile.

Manual Activation via Code:

1. If a QR code is unavailable, your carrier might provide an activation code.

2. Navigate to Settings > Network & Internet > SIMs > Add SIM Manually (may vary depending on your phone model).

3. Input the activation details as provided by your carrier.

4. The phone will configure the profile and activate the eSIM.

Using a Carrier App:

1. Download your carrier’s app from the Google Play Store (e.g., Airtel Thanks or MyJio).

2. Log in to the app and search eSIM in the Search box. 

3. Enter the requested credentials, like your phone number

4. Follow the instructions within the app, and your eSIM will be successfully set up.

What are the benefits of using an eSIM?

If you’re now wondering whether you should switch to an eSIM, the answer is most likely yes, especially if you want increased flexibility, convenience, and enhanced connectivity. Here are the key benefits of using an eSIM:

1. Frequent Travellers

eSIMs are a game-changer for frequent travellers. Instead of relying on expensive international roaming or purchasing physical SIM cards in each destination, you can activate a local eSIM plan in just minutes. This not only saves on data costs but also allows you to maintain access to your primary phone number while abroad.

2. Dual Numbers on a Single Device

eSIMs make it simple to manage both personal and professional life on a single device. By enabling multiple phone numbers on the same smartphone, you can seamlessly switch between work and personal profiles. This eliminates the need to carry two phones, streamlining your daily communication and enhancing convenience.

3. IoT and Wearable Devices

The eSIM’s compact and embedded design is ideal for Internet of Things (IoT) devices and wearables such as smartwatches, fitness trackers, and connected home gadgets. It provides these devices with seamless connectivity without the need for a bulky SIM slot. This ensures uninterrupted functionality while reducing device size and enhancing portability.

4. Enhanced Security

Unlike physical SIM cards that can be lost or stolen, eSIMs are integrated into your device. This digital setup is directly linked to your device and carrier account, reducing the risk of misuse. Losing a device with an eSIM is less concerning as the eSIM cannot be removed and misused by unauthorised individuals.

5. Environmentally Friendly Option

eSIMs eliminate the need for physical SIM cards and their associated plastic packaging. By going digital, eSIMs reduce waste and contribute to a more sustainable future. This makes them a perfect choice for environmentally conscious users who want to minimise their carbon footprint while embracing advanced technology.

Things to know before choosing an eSIM

Before switching to an eSIM, here are some important points to consider to ensure a smooth experience:

• Device compatibility: Not all devices support eSIM functionality. Ensure that your smartphone, smartwatch, or IoT device is eSIM-compatible before making the switch. Leading manufacturers like Apple, Samsung, and Google offer devices with eSIM capabilities.

Pro-tip: To check if your device supports eSIM functionality, navigate to the Mobile Services or Network & Internet (name may vary by device) in the Settings. For Android users, an alternative method is to dial *#06# and press the call button. If your device is eSIM-compatible, you will see a unique eSIM Identification Number (EID) displayed on your screen.

• Plan and data transfer restrictions: Switching eSIM profiles or transferring an eSIM plan between devices may have limitations. Some carriers might restrict how often you can transfer an eSIM, and additional charges may apply. Before switching devices, consult your carrier to understand the process for transferring your eSIM and any associated fees or restrictions.

• Roaming restrictions: Some eSIMs may not support international roaming. Before travelling, verify whether your eSIM plan allows you to roam globally or if you need to activate a local plan.

• Limited multiple active profiles: While eSIMs allow you to store multiple carrier profiles, only one profile can be active at a time. If you rely on multiple carriers simultaneously, this may limit your options.

• Software update dependency: eSIM functionality is often tied to the device’s operating system and software. If your device isn’t running the latest software, you may encounter issues during eSIM activation or usage. Make sure to always update your device to the latest firmware or operating system version to ensure compatibility with eSIM features and carriers.

Looking for the best eSIM for your international travel? Make sure to read our comprehensive guide on the best eSIM(s) for international travel and discover the pros and cons of the top 6 eSIM(s) in the market: Nomad, aloSIM, Saily, Ubigi, ETravelSim and Matrix.  

Conclusion

The eSIM represents a paradigm shift in mobile connectivity. By eliminating the need for physical SIM cards, it enhances convenience, flexibility, and sustainability. As technology continues to advance and adoption rates rise, eSIM is set to become the new standard for mobile communication.

Whether you’re a frequent traveller, a tech enthusiast, or a business professional, eSIM offers a glimpse into a future of seamless and efficient connectivity. The possibilities are endless, and the journey of eSIM has just begun.