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HOME » Technology » What is iSIM and how is it different from eSIM?

What is iSIM and how is it different from eSIM?

iSIM: The Next Generation of SIM Technology

October 30, 2023
in Technology
Reading Time: 3 mins read
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iSIM, or Integrated SIM, is a new type of SIM technology that does not require a separate chip or module to store the subscriber identity information. Instead, iSIM is integrated directly into the system-on-chip (SoC) of the device, along with the processor, memory, and other components.

This means that iSIM can save space, power, and cost for device manufacturers and users.

iSIM is an evolution of eSIM, or Embedded SIM, which is a type of SIM that is embedded in the device and can be programmed remotely.

eSIM allows users to switch between different network operators without changing physical SIM cards. However, eSIM still requires a separate chip or module to store the SIM information, which takes up space and consumes power.

iSIM eliminates the need for a separate SIM chip or module and integrates the SIM functionality into the SoC. This makes iSIM more secure, as it cannot be removed or tampered with.

iSIM also comes with a Secure Processing Unit (SPU), which adds an additional layer of protection for the SIM information and other sensitive data. Moreover, iSIM does not require any power to operate, unlike eSIM and physical SIM cards, which need to be constantly powered on.

What are the benefits of iSIM?

iSIM offers several benefits for device manufacturers and users, such as:

  • Space saving: iSIM can free up space inside the device that would otherwise be occupied by a SIM card slot or a SIM chip or module. This can allow device manufacturers to design sleeker and more compact devices or use the extra space for other features, such as larger batteries, cameras, or speakers.
  • Power saving: iSIM does not need any power to operate, unlike eSIM and physical SIM cards, which need to be constantly powered on. This can reduce the power consumption and extend the battery life of the device.
  • Cost saving: iSIM can reduce the cost of manufacturing and maintaining devices, as it eliminates the need for a separate SIM card slot or a SIM chip or module. This can also lower the cost of ownership for users, as they do not need to buy or replace physical SIM cards.
  • Security: iSIM is more secure than eSIM and physical SIM cards, as it is integrated into the SoC and cannot be removed or tampered with. iSIM also comes with a SPU, which provides an additional layer of protection for the SIM information and other sensitive data. Furthermore, iSIM can enable secure authentication and encryption for various applications and services, such as mobile payments, digital identity, and IoT devices.
  • Flexibility: iSIM can provide the same flexibility as eSIM, as it allows users to switch between different network operators without changing physical SIM cards. iSIM can also support multiple profiles and subscriptions on a single device, such as personal and work numbers or local and international plans.

Which devices support iSIM?

iSIM is a relatively new technology that has not yet been widely adopted by device manufacturers and network operators. However, Qualcomm, one of the leading chipmakers in the world, has announced that its flagship Snapdragon 8 Gen 2 SoC has been officially certified by GSMA for its iSIM capabilities. The Snapdragon 8 Gen 2 SoC is expected to power some of the high-end smartphones that will launch in 2023.

Qualcomm has also demonstrated its iSIM technology on a modified Samsung Galaxy Z Flip 3 smartphone last year. The company claims that its iSIM solution can support up to 16 profiles on a single device and enable seamless switching between different networks.

Apart from smartphones, iSIM can also be used for other types of devices that require connectivity, such as smartwatches, tablets, laptops, wearables, IoT devices, and connected cars. iSIM can enable these devices to connect to various networks without relying on physical SIM cards or tethering to other devices.

What are the challenges of iSIM?

iSIM is a promising technology that can offer many advantages for device manufacturers and users. However, there are also some challenges that need to be overcome before iSIM can become mainstream.

One of the main challenges is the compatibility and interoperability of iSIM with different network operators and regions. Currently, there is no universal standard or regulation for iSIM that can ensure its consistent performance and functionality across different networks and countries. Therefore, device manufacturers and network operators need to work together to develop and implement compatible solutions that can support iSIM.

Another challenge is the user awareness and acceptance of iSIM. Many users may not be familiar with iSIM or may prefer to use physical SIM cards for various reasons, such as convenience, familiarity, or security. Therefore, device manufacturers and network operators need to educate users about the benefits of iSIM and provide them with easy and convenient ways to activate and manage their iSIM profiles.

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