Everything You Need to Know About eSIMs and Their Benefits

eSIMs are considered one of the future drivers of wireless technology, bringing many benefits. Using them may result in more widespread adoption of cellular services in the future. If a device can connect to a cellular network without the need for a physical SIM card, a user is no longer limited by the number of SIM cards they possess. In addition, the need to switch SIM cards is eliminated, which makes it convenient for users to change plans, networks, and devices. This may also reduce the cost of handsets as the need for a physical SIM card hardware is eliminated.  

What Is an eSIM?

eSIMs are embedded SIM chips that are automatically installed in devices for mobile service provisioning. It is built into smartphones, tablets, laptops and wearables before these devices are shipped. eSIMs are digitally signed and cryptographically verified to ensure that they are from a trusted source. They are installed at the time of device manufacturing and remain in a dormant state until they are activated using QR or activation codes. eSIMs' main benefit is that they replace the need for physical SIM cards, allowing users to set up service quickly and easily online through their device interface.

How Does an eSIM Work?

eSIM allows you to connect to your mobile network without the need for a physical SIM card. Your mobile operator or service provider issues an eSIM QR or activation code when you buy a wireless plan. Once you activate such code on your device, the eSIM is downloaded to your device chip and is ready for usage. The eSIM remains in a dormant state until you configure it to connect to a mobile network. Once activated, you can use your device with the wireless service that you bought, no matter where you are in the world. And your device is always able to connect to your mobile operator’s service exactly like with SIM cards.

What Are the Benefits of eSIMs?

There are a lot of benefits of eSIMs. Here are some of them.

  • eSIMs eliminate the need for physical SIM cards and therefore support the move to paperless billing and instant activation which users to save time and money.
  • eSIMs allow service providers to remotely activate multiple devices using the same cellular service. For example, a service provider can remotely activate devices for its corporate clients and provide a secure connection for the devices by using mobile virtual private networks (VPNs).
  • eSIMs allow for the delivery of software updates. For example, a service provider can use a cellular data eSIM to deliver software updates for a previously downloaded application.
  • eSIMs make it easier to port services between devices. For example, a service provider can use an eSIM to port the same service across multiple devices and operating systems.
  • eSIMs make it easier for users to connect to multiple networks and plans. For example, a user can use different eSIMs for travel, business, or personal usage.
  • eSIMs help to reduce the cost of handsets by eliminating the need for a physical SIM card and its associated hardware.
  • eSIMs allow for the delivery of content and services to devices online, regardless of location.

Why eSIMs Are Important

Service providers and mobile operators have seen the need to deploy eSIMs in their networks. This is due to the growing demand for cellular connectivity in the Internet of Things, which has the potential to create a variety of new use cases for cellular operators. eSIMs reduce the costs associated with managing a large number of mobile devices, as the operator does not need to ship out new SIM cards. eSIMs are also useful in managing mass-market devices such as smartphones, tablets, TVs and wearables.

For consumers, eSIMs offer convenience on top of other benefits. Because eSIMs are embedded in a device, they can be activated and deactivated instantly, allowing the user to switch cellular providers without the need to swap out the SIM card. This is especially convenient since users can keep their number if they switch carriers, and manage multiple plans on the same device.

For service providers, eSIMs offer cost-savings. Once an eSIM is put in a device, it is unused until activated with a new QR code, which means a service provider can save money on inventory, purchases, and distribution.


eSIMs are a technological breakthrough that has the potential to change the way cellular service is consumed. Therefore, eSIMs are a key component in the Internet of Things as consumers and companies switch to paperless billing, personalized services, and more connected way of life.

CELITECH offers the best eSIM service that allows your business to effectively distribute cellular data eSIM service to your mobile customers and/or employees. Check our eSIM API demo now to learn more.

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