eSIM Glossary: Key Terms You Need to Know in 2025

As new technologies continue to appear understanding the terminology associated with them becomes essential for consumers and businesses alike. This glossary provides a comprehensive overview of key terms related to eSIM technology and virtual numbers, helping users navigate this rapidly changing landscape with confidence.

Activation

Activation refers to the process of enabling an eSIM or virtual number so that it can be used on a device. This often involves either scanning a QR code or manually entering an activation code, streamlining the onboarding process for users. The activation process may differ slightly depending on the carrier and device manufacturer.

APN (Access Point Name)

An Access Point Name (APN) is a gateway between a mobile network and the internet, essential for accessing mobile data services. Properly configuring the APN is vital for users to ensure that their devices can connect to the internet seamlessly.

Carrier Lock

Carrier lock is a restriction imposed by some mobile operators that prevents a device from being used with other carriers unless it is explicitly unlocked. This can limit a user's flexibility and choice when it comes to switching carriers or utilizing international services.

Cloud SIM Technology

Cloud SIM technology enables users to manage multiple SIM profiles in the cloud, offering flexibility in choosing carriers based on location or specific needs. This technology allows for dynamic management of mobile services without the limitations of physical SIM cards.

Data Plan

A data plan is a subscription service provided by mobile carriers that grants users a specified amount of data usage over a defined period. Plans can vary significantly, from limited data options to unlimited offerings, allowing users to choose a plan that suits their needs.

Read also: Yesim's Data Plans

Data Roaming Charges

Data roaming charges are fees incurred when using mobile data services while traveling outside of the home network's coverage area. Understanding these charges is crucial for travelers to avoid unexpected costs on their mobile bills.

Device Compatibility

Device compatibility pertains to a device's ability to support eSIM technology, which can vary by manufacturer and model. Ensuring that a device is eSIM-compatible is essential for users looking to leverage the benefits offered by this technology.

eSIM (Embedded SIM)

An eSIM (Embedded SIM) is a sophisticated, programmable SIM card incorporated directly into a device. Unlike traditional SIM cards that are removable and require physical swapping to change carriers or plans, an eSIM allows users to switch carriers and plans seamlessly and remotely, without needing to handle a physical card. This flexibility makes eSIM technology increasingly popular among consumers and businesses alike. As of 2023, the global eSIM market is projected to reach approximately $8 billion by 2025, reflecting a growing acceptance and implementation of this innovative technology.

eSIM Management Platform

An eSIM management platform is a system that facilitates the activation, deactivation, and management of eSIM profiles for users and service providers. These platforms streamline the process, ensuring that users have straightforward and efficient access to their eSIM options.

eUICC (Embedded Universal Integrated Circuit Card)

The Embedded Universal Integrated Circuit Card (eUICC) is the chip that houses the eSIM and allows for remote provisioning of multiple profiles. This chip is essential for the flexibility and adaptability of eSIM technology, making it easier for users to select and manage their mobile services.

International Mobile Equipment Identity (IMEI)

The International Mobile Equipment Identity (IMEI) is a unique identifier assigned to mobile devices. This identifier plays a crucial role in authenticating devices on a mobile network, ensuring that only legitimate devices can access network services.

International Mobile Subscriber Identity (IMSI)

The International Mobile Subscriber Identity (IMSI) is a unique number assigned to each SIM card that helps identify the user on the mobile network. The IMSI is crucial for authenticating users and facilitating their access to network services and mobile connections.

IoT (Internet of Things)

The Internet of Things (IoT) refers to the interconnection of everyday devices to the internet, often utilizing eSIM technology for continuous connectivity. This integration enables smart devices to communicate with one another, improving automation, enhancing user experience, and streamlining everyday tasks.

Mobile Network Operator (MNO)

A Mobile Network Operator (MNO) is a telecommunications company that provides wireless communication services. MNOs possess their own infrastructure, including radio towers, transmission equipment, and spectrum licenses, enabling them to deliver mobile services directly to consumers.

Mobile Virtual Network Operator (MVNO)

A Mobile Virtual Network Operator (MVNO) is a service provider that offers mobile communication services to consumers without owning its own network infrastructure. Instead, MVNOs lease capacity from MNOs to provide services to their subscribers.

Multi-IMSI

The multi-IMSI feature allows an eSIM to store multiple IMSIs, enabling users to switch easily between different carriers or plans. This flexibility is particularly beneficial for global travelers, international businesses, and users seeking to optimize their mobile services.

Network Slice

Network slicing is a method employed in 5G networks that allows for multiple virtual networks to be created on a single physical infrastructure. This capability enables operators to tailor services for specific use cases, enhancing performance and efficiency across diverse applications.

Number Portability

Number portability refers to the ability for users to retain their existing phone number when switching from one carrier to another. This consumer-friendly feature enhances user choice and encourages competition among service providers.

Over-the-Air (OTA) Provisioning

Over-the-Air (OTA) provisioning is a method allowing eSIM profiles to be downloaded and activated remotely. This eliminates the need for physical access to the device and provides a more convenient and efficient way for users to manage their mobile services.

Profile

A profile consists of a set of configurations stored on an eSIM. This includes critical information about the mobile carrier, such as the user's phone number, data plan, and specific network settings necessary for connecting to the mobile network.

QR Code

A QR code, or Quick Response code, is a two-dimensional barcode used for easy scanning to activate eSIM profiles or virtual numbers. QR codes serve as an efficient method for users to access the information they need quickly, enhancing the activation and management experience.

Roaming

Roaming refers to the ability of a mobile device to function on a different network when traveling outside the coverage area of the user's home network. This feature typically incurs additional charges but provides essential connectivity for users on the go.

SIM (Subscriber Identity Module)

The Subscriber Identity Module (SIM) is a small card that is inserted into mobile devices and is vital for accessing mobile network services. It stores essential information, including the International Mobile Subscriber Identity (IMSI), which allows users to connect to their mobile network. The SIM card is foundational for establishing secure connections, enabling phone calls, text messaging, and data usage.

Security Profile

A security profile consists of settings associated with an eSIM that defines security measures, such as encryption and authentication methods. With increasing concerns over data privacy and security, understanding these profiles is essential for users to protect their information.

Subscription Management

Subscription management involves overseeing user subscriptions for various telecom services, including eSIM profiles and virtual numbers. Effective subscription management ensures users can access the services they need while optimizing their mobile experience.

Usage-Based Billing

Usage-based billing is a billing model where customers are charged based on their actual usage of services rather than a flat fee. This model is particularly appealing to users who want to pay only for the services they utilize, thus promoting transparency and cost-effectiveness.

User Equipment (UE)

User Equipment (UE) encompasses any device that connects to a mobile network, including smartphones, tablets, and IoT devices. Understanding the capabilities and limitations of user equipment is essential for consumers and businesses seeking to utilize mobile technology effectively.

Virtual Number

A virtual number is defined as a phone number that is not associated with a specific phone line or physical device. Instead, it can route calls and messages to various devices or applications, offering users the ability to maintain multiple lines without the need for separate physical SIM cards. This can be particularly useful for businesses or individuals who want to manage communications across different platforms.

Read also: What is eSIM and how does it work

5G

The fifth generation of mobile network technology (5G) offers significantly faster speeds and more reliable connections than previous generations. As 5G becomes more prevalent, its implications for consumer services, business applications, and IoT connectivity will continue to grow.

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We hope this glossary serves as a valuable resource for understanding the key concepts related to eSIM and virtual number technologies. Stay informed about the latest terminology and trends to make the right decision and harness the full potential of modern communication solutions.

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