What is an eSIM? Complete Guide [2025]

What is eSIM? It is a digital evolution of the traditional SIM card, allowing you to activate mobile service instantly without swapping chips. More business travelers and digital nomads are choosing eSIM for effortless global connectivity. Discover how easy it is to activate your eSIM with BitJoy and unlock a smarter way to stay connected.

What is an eSIM?

An eSIM (embedded SIM) is a digital SIM card embedded directly into a device. Unlike traditional physical SIM cards, an eSIM is rewritable and can be programmed remotely. This means users can switch networks or activate cellular plans instantly while traveling across regions, without needing to swap a physical card.

The concept of eSIMs emerged as a solution to the limitations of physical SIM cards. Initially adopted in smartwatches and IoT devices, the technology has rapidly expanded into smartphones, tablets, laptops, and more. Its evolution marks a significant step in the shift toward fully digital and flexible mobile connectivity.

How Does an eSIM Work?

An eSIM operates through a secure element embedded in a device’s motherboard. Mobile network operators can write, update, or delete subscriber profiles remotely using Over-the-Air (OTA) provisioning. No more physical SIM swaps—just scan, tap, and connect effortlessly.

The core technology behind eSIM includes remote SIM provisioning (RSP) standards developed by the GSMA, which ensure secure and universal compatibility. Thanks to these protocols, users can download carrier profiles from a QR code or app interface, simplifying activation and use.

eSIM vs. Traditional SIM Cards: Key Differences

When choosing between an eSIM and a traditional SIM card, many users wonder what the real differences are and which option better suits their needs. Understanding the key distinctions in design, functionality, and security can help you make an informed decision. The table below provides a clear, side-by-side comparison of these essential factors.

Here’s how eSIMs stack up against traditional SIM cards in key areas like size, security, and flexibility.

Benefits of Using an eSIM

As mobile technology continues to evolve, eSIM is emerging as a more flexible and convenient alternative to traditional SIM cards. From travel to environmental impact, its advantages extend far beyond simple connectivity. Here are some of the key benefits of using an eSIM.

• International travel: Travelers can easily switch to a local carrier or activate an international data plan without needing to buy a new SIM card, ensuring seamless connectivity across borders.

• Space optimization: Manufacturers gain more internal space, which can be repurposed for improved battery life or additional components, making devices more efficient.

• Network flexibility: Users can change carriers or switch between plans without physically removing or replacing cards, simplifying the overall experience.

• Eco-friendly: eSIM reduces plastic waste and packaging typically associated with traditional SIM cards, contributing to a more sustainable environment.

• Connection quality: eSIM offers high-speed, stable connections, ensuring reliable service wherever you go.

• Cost-effective: eSIM enables users to choose affordable plans and avoid roaming charges, making it a budget-friendly option.

• Flexible payment methods: Users can enjoy the convenience of flexible, digital payment options for activating and managing their mobile plans.

Potential Drawbacks of eSIM Technology

While eSIM brings many modern conveniences, it’s not without its challenges. Users should be aware of a few potential limitations that may affect the experience depending on location, device type, and service provider. Below are some drawbacks worth considering.

• Compatibility issues: Not all devices or carriers support eSIM technology, especially in certain regions.

• Security and privacy: While eSIM is generally secure, there are potential risks of unauthorized access if providers lack robust cybersecurity measures. Mobile network operators need to ensure strong security protocols to protect user data.

• Carrier support dependency: Activation often depends on carrier readiness and support, which can be limited in some areas.

eSIM Compatible Devices

As eSIM adoption continues to grow, more devices across different categories are now built with eSIM support. From smartphones to smartwatches, tablets, and even IoT applications, eSIM is becoming a standard feature in modern tech. Below is an overview of the most common types of devices that support eSIM technology today.

Smartphones Supporting eSIM

Many of today’s leading smartphone brands have integrated eSIM functionality into their newer models. Here are some popular eSIM-enabled smartphones.

• Apple: iPhone XR and newer models support eSIM.

• Google: Pixel 3 and above are eSIM-enabled.

• Samsung: Selected models like Galaxy S20 series, Z Fold (except the US version),...

Other eSIM Compatible Devices

Beyond smartphones, eSIM technology is also available in a variety of other smart devices. These include tablets, wearables, and even devices used in smart infrastructure.

• Tablets: iPad Pro, iPad Air (3rd Gen+),  iPad Mini

• Smartwatches: Apple Watch Series 3+ (Cellular), Samsung Galaxy Watch.

• Laptops: Some Dell, HP, Acer, ASUS and Lenovo ThinkPad models.

• IoT Devices: Widely used in logistics, smart homes, and automotive tech.

Major eSIM Providers

As eSIM technology becomes more mainstream, users now have a wide selection of providers to choose from. These providers generally fall into two categories: traditional mobile network operators (MNOs) and digital-first eSIM providers. Understanding both options helps users make informed choices based on coverage, convenience, and pricing.

Mobile Network Operators

Many traditional mobile network operators around the world have begun offering eSIM services, allowing customers to activate cellular plans digitally without needing a physical SIM card. These include well-established carriers with a physical infrastructure and retail presence.

Some of the most notable eSIM-supporting carriers include:

• AT&T (United States)

• T-Mobile (United States and select international branches)

• Verizon (United States)

• Vodafone (United Kingdom, Europe, Asia-Pacific)

• Orange (France and other parts of Europe)

• Telefónica / Movistar (Spain, Latin America)

• Telstra (Australia)

• Rogers (Canada)

• Singtel (Singapore)

• NTT Docomo (Japan)

Digital eSIM Providers

BitJoy stands out as a forward-thinking digital eSIM provider designed for modern travelers and global users. With a streamlined user experience and robust technical infrastructure, BitJoy offers:

• Instant eSIM activation: Users can download and activate data plans in just a few taps.

• Global coverage: Access to multiple regional and worldwide plans without switching SIMs.

• Transparent pricing: No hidden fees, no contracts—just straightforward, prepaid plans.

• 24/7 customer support: Get quick and efficient help at any time with AI-powered chatbot support, available around the clock.

• User-centric interface: A smooth, intuitive web-based platform or website that makes switching and managing profiles effortless.

Besides BitJoy, several other digital providers have entered the market to meet niche or international needs:

• Airalo – Offers local and regional plans with easy setup.

• Holafly – Focuses on travel-friendly unlimited data packages.

• Truphone – Known for corporate solutions and IoT integration.

• Ubigi – Offers connectivity for cars, tablets, and mobile hotspots.

• GigSky – Provides flexible plans for travelers and digital nomads.

However, BitJoy differentiates itself by offering a comprehensive set of features:

• Flexible payment options – Allowing users to pay through various methods, including cryptocurrency.

• AI-powered technology – Enhances the activation and management of eSIM profiles, ensuring an efficient and seamless experience.

• Crypto Integration – Users can leverage cryptocurrency for payments, making it a perfect fit for digital nomads and tech-savvy travelers.

How to Get an eSIM

Getting an eSIM can be a smooth process, but the steps involved depend on whether you choose a local provider or an international eSIM provider. Both options offer flexibility and convenience, but each has its distinct advantages. Below is a guide to help you navigate through the process based on your preference.

Getting an eSIM from a Local Provider

When opting for a local provider, the process is often similar to activating a traditional SIM card, but with the added benefit of digital activation. Here's what you typically need to do:

1. Visit the provider’s store or website: You can visit a physical retail store or go directly to the carrier’s website to begin the eSIM registration. Many providers now offer online registration for added convenience.

2. Verify your identity: Just like with a traditional SIM card, the provider will require you to verify your identity. This process is crucial for ensuring the security of your account and preventing fraud.

3. Choose a plan: After identity verification, you’ll be asked to choose a suitable mobile plan. Depending on your needs (e.g., data, minutes, international usage), there will be a variety of plans to choose from.

To complete the process of obtaining an eSIM from a local provider, the following documents may be required:

• A valid ID: Typically, you will need a government-issued identification card (passport, national ID, driver’s license).

• Proof of local address: Some providers may require proof of residence, such as a utility bill or rental agreement, especially for long-term plans.

• Eligibility: Ensure that your device supports eSIM technology and that the provider offers eSIM services in your region. Some carriers may restrict eSIM use based on the device or geographical location.

Getting an eSIM from an International Provider

If you're traveling internationally or need a more flexible solution, international eSIM providers like The BitJoy are a great option. These services allow users to activate an eSIM remotely, with no need for physical SIM cards or contracts. Below is a guide for getting an eSIM from an international provider.

BitJoy's seamless eSIM activation process

1. Instant activation: BitJoy offers a simple and seamless process for activation, typically via an app or a QR code. Users can activate the eSIM instantly and start using their data plan within minutes.

2. No physical SIM or contracts: With BitJoy, there's no need to purchase a physical SIM card, nor do users have to sign a long-term contract. The service is pay-as-you-go, offering more freedom for those who travel or need short-term connectivity.

Superior benefits of BitJoy as one of the top international providers: 

• Instant virtual/digital delivery: BitJoy offers instant eSIM activation, allowing quick device downloads for last-minute travelers or those needing immediate connectivity. It provides a cost-effective, long-term solution with flexible payments, crypto support, and AI integration, perfect for frequent travelers, business professionals, and digital nomads.

• Travel-Ready plans: BitJoy’s plans are designed with international travelers in mind. Whether you're in Europe, Asia, Australia, or America, you can choose from a wide variety of global data plans that fit your travel needs.

• Support for over 130+ countries: One of the biggest advantages of international eSIM providers is their wide coverage. With BitJoy, users can access eSIM services in over 130 countries, making it an ideal option for globetrotters and digital nomads.

How to Activate an eSIM    

Activating an eSIM is a simple process, but the steps can vary slightly depending on the device. Below are the detailed instructions for both iOS and Android devices.

Activating eSIM on iOS Devices

For iPhone users, activating an eSIM is straightforward. Follow these step-by-step instructions:

1. Go to settings: Open your iPhone and navigate to Settings.

2. Tap on cellular: Scroll down and select Cellular (or Mobile Data).

3. Add cellular plan: Tap on Add Cellular Plan.

4. Scan the QR code or use the provider’s app: You’ll be prompted to scan the QR code provided by your carrier or use the carrier’s app to activate the plan.

5. Follow the prompts: After scanning or using the app, follow the on-screen instructions to finish the activation.

Troubleshooting Tips: Ensure your device is unlocked and updated. Restart if the plan doesn’t appear.

Activating eSIM on Android Devices

For Android users, the process may differ slightly based on the phone model and manufacturer. Here's how to activate eSIM:

1. Open settings: Go to Settings on your Android phone.

2. Navigate to network & internet: Tap on Network & Internet, then select Mobile Network.

3. Add carrier or eSIM: Tap on Add Carrier or Add eSIM.

4. Scan QR code or enter details manually: Scan the QR code provided by your eSIM provider or input the details manually.

5. Complete activation: Follow the on-screen instructions to finalize the activation.

Tips: Check compatibility, ensure Wi-Fi connection, and confirm plan availability in the region.

eSIM and 5G: What You Need to Know

eSIMs are fully compatible with 5G technology, making them ideal for the future of mobile connectivity. They allow quick network switching and support multiple profiles, which can be crucial for accessing the best 5G coverage and speeds.

Using eSIMs with 5G networks provides enhanced latency, better speed, and a more flexible user experience, especially for those who frequently change locations or carriers.

The Future of eSIM Technology

The future of eSIM technology is poised for wider adoption across various device types, from smartphones to smart appliances and autonomous vehicles. As telecom standards evolve, more carriers will offer eSIM support, ensuring seamless global connectivity. 

Additionally, the integration of crypto payment options will enhance the flexibility and accessibility of eSIM services, especially for digital nomads and global travelers. As eSIMs play a crucial role in expanding IoT networks, expect continuous innovation in security and management tools to meet the growing demand for secure, efficient, and cost-effective solutions.

FAQs About eSIM

Here are answers to some common questions about eSIM technology:

• Who is eSIM for?

eSIM is perfect for frequent travelers, digital nomads, and those using IoT devices. It solves the pain point of constantly swapping physical SIM cards, offering a seamless, hassle-free experience. 

For example, Jack, a business traveler, no longer has to search for a local SIM when arriving in a new country. Instead, he can activate an international plan instantly. Sarah, a freelancer, saves on costly SIM card purchases and activation fees as she moves between countries. 

eSIM also simplifies connectivity for smart devices, like security cameras or home assistants, eliminating the need for physical SIMs in each device. Whether for cost-efficiency, convenience, or global connectivity, eSIM is the perfect solution.

• What is an eSIM?

An eSIM (Embedded SIM) is a digital SIM card embedded directly into your device, allowing you to switch mobile carriers and activate plans remotely, without needing a physical SIM card.

• Is eSIM better than a traditional SIM?

For most users, eSIM offers significant advantages, especially for international travelers and those who use dual-network functionality, as it eliminates the need for multiple physical SIM cards.

• Can I use eSIM and a physical SIM together?

Yes, many modern devices support dual-SIM functionality, where one SIM slot can hold a physical SIM card, and the other can be used for eSIM. It's important to note that you don't need to insert the eSIM into a physical slot. 

Instead, eSIM is activated digitally without the need for a physical card. This setup is particularly useful for users who need separate work and personal numbers or those who travel frequently, allowing them to easily manage multiple plans.

Note: For first-time users, it’s essential to understand that eSIM doesn't require a physical slot; it’s activated digitally.

• How do I know if my phone supports eSIM?

To check if your phone supports eSIM, refer to the manufacturer's specifications or go to your device's settings under Mobile Network or Cellular options. You can also check the user manual or visit the device manufacturer’s website.

So, what is eSIM and how does it work? We hope this article has given you a comprehensive understanding of eSIM technology and its remarkable advantages. To stay updated with more in-depth knowledge about technology and investment, don’t forget to follow BitJoy.