How Do eSIMs Work?

Published: 24 June 2024

eSIMs, also known as embedded SIMs, are transforming the mobile industry. Unlike traditional SIM cards, these integrated chips eliminate the need for physical swapping. 

This transition to virtual SIM cards signifies a great shift in connectivity. Their increasing significance is reshaping the mobile landscape, providing unparalleled flexibility and convenience.

This blog will dive deep into this technology.

The technology behind eSIMs

eSIM stands for Embedded Subscriber Identity Module. It's a digital SIM that allows you to activate a cellular plan from your carrier without a physical card. 

These tiny chips are built into your phone or other devices. They store all necessary information for network authentication. 

They use the same technology as traditional SIMs. However, the key difference is that eSIMs do not need to be physically inserted and removed from a device.

Advantages of eSIMs

The advent of eSIMs brings various advantages to consumers and service providers alike. Below, we'll outline several key advantages of eSIM technology. We will highlight why eSIMs are becoming essential in new-generation mobile devices.

Seamless device switching and multiple profiles

eSIMs, unlike traditional SIMs, allow you to store multiple profiles. You can switch between these profiles without changing physical SIM cards. This makes it easier to manage multiple numbers and data packages. 

Switching between personal and business lines also becomes more seamless. This is especially useful for frequent travelers who want to switch to a local carrier without obtaining or swapping physical SIMs.

Additionally, physical SIM cards also run the risk of being damaged or lost. When this happens, it can cause great inconvenience and potential loss of data.

Cost-effective travels abroad

For travelers, eSIMs offer significant cost and convenience advantages. With an eSIM-enabled device, you can switch to a local carrier when abroad. This allows you to avoid expensive international roaming charges. 

Moreover, they allow easy access to local data plans without buying a physical SIM card. This is particularly useful for travelers visiting multiple countries. It enables them to switch to the most affordable eSIM plan based on location.

Impact on IoT and smart devices

eSIM technology is essential for the Internet of Things (IoT) and smart devices. It enables easier and more robust connectivity options for various devices. 

This includes wearables, smart home devices, and even cars. With eSIMs, these devices can connect to cellular networks seamlessly. There's no need for a physical SIM card or WiFi connection.

As you can see, the advantages of eSIM technology are significant and wide-ranging. They offer more flexibility, convenience, and cost savings for consumers. They also open up new possibilities for service providers and device manufacturers.

How to set up an eSIM

Setting up an eSIM on your device might initially seem challenging. However, it is an easy-to-follow process. Below are the essential steps that will guide you through the process of configuring an eSIM:

  1. Check device compatibility with eSIM technology. Some older devices may not support eSIMs, so it's best to confirm before proceeding. A device that supports eSIMs will have its own unique EID number.
  2. Choose a carrier and plan that supports eSIM. You can get an eSIM from your current carrier or switch to a new one.
  3. Follow the carrier's instructions to download the eSIM profile. These instructions may vary depending on the device and carrier. They usually involve scanning a QR code or entering a numerical code.
  4. Activate the eSIM profile through your device's settings. You may need to restart your device for the changes to take effect.

Voila! You now have an eSIM activated on your device, allowing you to enjoy all the benefits mentioned above. 

What devices support eSIMs?

Many modern mobile phones, tablets, and smartwatches support eSIM technology. The most popular example would be Apple products, such as the latest iPhone models. Android devices like the Google Pixel and Samsung Galaxy also offer eSIM support.

It is clear that eSIMs are becoming more prevalent. Because of this, we expect even more device manufacturers to adopt this technology. However, not all carriers support eSIMs or offer plans compatible with eSIM-enabled devices. As such, it's essential to check with your carrier before switching to an eSIM. 

For a complete list of devices that support eSIM technology, visit our device compatibility page.

What Devices Support E Si Ms

Security and eSIMs

eSIMs offer many advanced security features. For example, you can remotely manage and secure a SIM profile. In comparison, traditional SIM cards can be physically removed or swapped. 

This makes eSIMs' security level much stronger. Additionally, eSIMs do not store information like PUK codes or network keys. This reduces the risk of data theft.

eSIMs also have built-in encryption features. This makes it more challenging for hackers to intercept and decode network communication. 

In addition, some carriers offer added security measures like two-factor authentication. This can provide an extra layer of protection. This level of security is particularly crucial for IoT devices. These devices require a high level of data privacy and protection.

The future of connectivity with eSIMs

eSIMs play a pivotal role in the evolution of telecommunications. More devices are becoming eSIM-enabled. So, we can expect to see a significant impact on how we use and access mobile networks.

Innovations like Truely eSIMs are at the forefront of this transformation. Truely eSIMs are designed to work with any eSIM-enabled device and any carrier. This makes it easier to switch carriers or plans without changing physical SIM cards. 

With Truely eSIMs, you can take full advantage of all the technology's benefits. This creates a more connected and convenient mobile experience. Along with other eSIM providers, Truely is paving the way for a more connected future. 

The bottom line

The shift to eSIM technology is reshaping the telecommunications landscape. We are transitioning to a fully digital SIM card era. With this comes boundless possibilities for innovation and improved user experience.

With eSIMs, we can look forward to a future with more freedom and ease. So, if you haven't already, consider making the switch to eSIMs now and experience the difference for yourself.

Frequently asked questions

Does an eSIM use your phone number?

You can use your existing phone number with an eSIM. Some carriers will allow you to transfer or port your current number to an eSIM profile.

How do I use an eSIM?

Using an eSIM is similar to using a traditional SIM card. You will need to activate the eSIM profile on your device and ensure that you have a plan with a carrier that supports eSIM technology.

Can I switch carriers with an eSIM?

Yes, you can switch carriers with an eSIM by downloading a new carrier's eSIM profile onto your device. This eliminates the need to physically swap SIM cards.

Will all devices support eSIM in the future?

It is likely that more devices will become eSIM-enabled in the future. However, it ultimately depends on device manufacturers and carriers adopting this technology.  As we continue to see a rise in IoT.