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September 6, 2023

Everything You Need to Know about eSIM Technology

In an era defined by rapid technological advancement, the way we connect and communicate is constantly evolving. As our lives become increasingly intertwined with digital experiences, the limitations of traditional SIM cards have spurred the development of embedded SIM, or eSIM, heralding a new era of seamless connectivity.

What is an eSIM?

Imagine a world where swapping out physical SIM cards becomes a relic of the past, and activating a new mobile plan is as simple as scanning a QR code. This is the promise that eSIM technology holds, liberating us from the constraints of hardware-bound cellular connections. As we delve into the intricacies of eSIM card, we unravel a tapestry of convenience, flexibility, and potential.

In this blog post, we will explore its inner workings, benefits and potential drawbacks, and what is available eSIM in UK. Besides, we’ll teach you how to activate and use eSIM card. As we navigate this digital landscape, we'll uncover the intricacies of eSIM role in our lives, painting a comprehensive portrait of a future where connectivity knows no bounds.

What Is an eSIM Card?

Wondering what is an eSIM? Well, eSIM, or embedded Subscriber Identity Module, is a transform technology that is redefining the way we connect to mobile networks. Unlike traditional physical SIM cards, eSIMs are integrated directly into devices, eliminating the need for a physical card swap. This innovation offers a range of benefits and considerations that are reshaping our digital communication landscape.

Is eSIM Better? Advantages and Disadvantages

So now you know what is eSIM. eSIM has sparked a significant shift in how we approach mobile connectivity, leaving us pondering a pivotal question: Is eSIM truly better? To answer this query, we will delve into the pros and cons of using this eSIM card:

Pros of eSIM:

Unmatched Convenience: eSIM enables hassle-free activation and switching between carriers without the need for a physical SIM card.

Space-Efficiency: Devices with eSIM technology have more internal space for other components, contributing to sleeker designs and enhanced functionality.

Multiple Profiles: eSIM supports the storage of multiple carrier profiles on a single device, catering to travelers and multi-plan users.

Remote Activation: eSIMs can be remotely activated, making it a breeze to switch carriers or add plans while on the go.

Environmental Impact: With reduced plastic waste and manufacturing materials, eSIM is environmentally friendly.

Cons of eSIM:

Device Compatibility: Not all devices support eSIM technology, limiting its availability.

Carrier Dependency: eSIM activation and compatibility depend on carrier support and device manufacturers.

Security Considerations: Remote activation might introduce security risks if not properly managed.

Changing Carriers: Some carriers may not yet offer eSIM support or may have limitations on their usage.

Backup Challenges: Unlike physical SIM cards, eSIMs cannot serve as a backup in case of device loss or malfunction.

How Does eSIM Work?

At its core, eSIM functions much like its physical counterpart, storing essential information required for network access. However, eSIM takes this a step further by allowing you to remotely provision and manage your network profiles. Activation is often initiated through a QR code, app, or carrier-enabled process, eliminating the need for manual card insertion.

Behind the scenes, as how eSIM works, it relies on a secure chipset within your device, ensuring that your network data remains safe. The convenience doesn't end there – eSIMs enable seamless switching between carrier profiles without any physical intervention, making it ideal for travelers or those seeking flexible connectivity options.

Which UK Carriers Support eSIM?

Wondering if is eSIM available in the UK? Well, yes, it is. In the UK, several carriers have embraced eSIM technology, providing customers with the flexibility to choose their preferred carrier and plan. Notable carriers offering eSIM support include:

EE eSIMs - Get a regular plastic SIM card first if you want to use an eSIM with EE. You can order a new eSIM to replace this one once it has been ordered and activated.

Lyca Mobile eSIMs - Currently, Lyca Mobile offers several eSIM plans starting at £0.99 per month. The EE network will cover 4G and 5G, and there is instant online delivery so you can use the eSIM right away.

O2 - You can obtain an eSIM by going to your neighborhood O2 retail location or by calling O2's customer support line at 202. It may take up to 24 hours to transfer your plan onto an eSIM once you have an eSIM pack.

Three eSIMs - You can get your Pay Monthly plan switched to an eSIM if you have been a Three Pay Monthly customer since January 30, 2023. To qualify, you must have a Standard, Plus, or Premium plan.

Vodafone eSIMs - You can purchase an immediate-use eSIM plan from Vodafone online. Contrary to the other major networks, a plastic SIM card is not required. You can save a tonne of time and hassle by doing this.

How to Activate and Use eSIM Card?

Most advanced smartphones have an eSIM that enables you to activate a second cellular data plan that you can use both domestically and internationally without having to locate a physical SIM card.

Activating and using eSIM is straightforward on HONOR devices, and here's an illustrated guide using the HONOR Magic5 Pro. These steps also include how to add eSIM on the HONOR phone.

Step 1: Check Compatibility

Ensure your device supports eSIM technology. Check your device's specifications or contact the manufacturer or carrier to confirm compatibility.

Step 2: Obtain the QR Code

Then contact your mobile carrier to see if they offer eSIM support and whether your plan is eligible for eSIM activation. They will give you an eSIM activation QR code.

Step 3: Access Settings

Once you get the activation code, go to settings on your HONOR phone, then tap connections, tap SIM card manager, and navigate to the eSIM section.

Step 4: Add eSIM

Select “Add eSIM” and scan the QR code to complete the setup.

Step 5: Confirmation

Follow the on-screen instructions to confirm activation on your HONOR Magic5 Pro.

HONOR Magic5 Pro supports eSIM


In conclusion, an eSIM represents a revolutionary advancement in the world of telecommunications. By eliminating the need for physical SIM cards, eSIM technology streamlines device activation and enhances flexibility for users. Operating on a digital platform, eSIMs can be remotely provisioned and activated, allowing for easy switching between carriers and plans without the hassle of obtaining and inserting physical cards. This compact yet powerful innovation is transforming the way devices connect to cellular networks, offering a more convenient and adaptable experience for consumers and businesses alike.


Can I Transfer eSIM to a New Phone?

Yes, in most cases, eSIM profiles can be transferred to a new compatible device, allowing you to retain your connectivity settings.

Is eSIM Better than a Physical SIM Card?

eSIM offers enhanced convenience and the ability to switch carriers without changing physical cards. However, it might not be universally superior, as it depends on device compatibility and carrier support.

Can eSIM Support Multiple Networks Simultaneously?

Yes, eSIM can hold multiple carrier profiles, enabling you to switch between networks as needed, promoting flexibility and convenience.

Source: HONOR Club

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