The integrated SIM (iSIM) explained
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The integrated SIM (iSIM) explained
iSIM is the latest SIM card development which is space-saving and embedded directly into the device. This allows more compact and smaller application designs, especially on the Internet of Things (IoT). Using the iSIM technology, companies can implement their IoT solutions more cost-effectively and with greater flexibility.
iSIM: Definition and meaning
The term iSIM is short for integrated SIM, and is essentially an advanced eSIM. It is built directly into the chipset of a device, therefore making a separate SIM card unnecessary, and enabling a more efficient solution for small IoT applications. This allows companies to efficiently and easily manage and configure a multitude of connected devices.
Due to its fixed integration in the chipset, the integrated iSIM also has stronger security features compared to traditional SIM cards. They can reduce the risk of tampering and theft, while also allowing for remote programming and management of the SIM card. Therefore, companies can globally connect their devices with greater ease and at a lower cost.
eSIM vs. iSIM vs. traditional SIM Cards – a comparison
SIM cards are fundamental for IoT connectivity, and the development of the integrated SIM opens up new possibilities. Companies must carefully consider which SIM solution fits their needs best and, in the following table, we compare the iSIM with eSIMs and traditional SIM cards.
| iSIM | eSIM | Traditional SIM Card | |
|---|---|---|---|
| Security | Integrated in chipset, the highest security | Fixed integration, more secure than physical SIM | Removable, vulnerable to theft |
| Cost & Integration | Low production costs, no slot needed | Integration is associated with costs and higher management effort | Low manufacturing cost, physical exchange required |
| Flexibility | Remote access and management, ideal for global deployments | Remote switching of provider possible | Provider change only by swapping cards |
| Applications | IoT, industrial automation, vehicle networking | Smartwatches, tablets, modern smartphones, IoT | Mainly consumer devices, IoT |
| Features | Saves space in devices, ideal for compact designs | No physical SIM required | Easy to handle by users |
iSIM
- Security: Integrated in chipset, the highest security
- Cost & Integration: Low production costs, no slot needed
- Flexibility: Remote access and management, ideal for global deployments
- Applications: IoT, industrial automation, vehicle networking
- Features: Saves space in devices, ideal for compact designs
eSIM
- Security: Fixed integration, more secure than physical SIM
- Cost & Integration: Integration is associated with costs and higher management effort
- Flexibility: Remote switching of provider possible
- Applications: Smartwatches, tablets, modern smartphones, IoT
- Features: No physical SIM required
Traditional SIM Card
- Security: Removable, vulnerable to theft
- Cost & Integration: Low manufacturing cost, physical exchange required
- Flexibility: Provider change only by swapping cards
- Applications: Mainly consumer devices, IoT
- Features: Easy to handle by users
The integrated SIM is especially suitable for industrial automation where physical access is difficult, as well as offering maximum security and flexibility with minimal space requirements. Globally operating companies with centralized management of their IoT devices will particularly benefit from the iSIM technology.
How does the integrated SIM works
Unlike the eSIM, the iSIM is not soldered on but directly embedded into the device's chipset, as integrated SIMs no longer require a separate module or physical card. Instead, the entire SIM technology is located within the device's hardware, which saves space and enhances security by reducing the risk of tampering.
The integration process is based on so-called secure elements (SE), which are isolated security areas within the chipset. They securely store the necessary network information and authentication data, and allow seamless access to the mobile network without needing a physical SIM card. Network operators manage, update, or swap SIM profiles remotely through Over-the-Air (OTA) processes, making the integrated SIM highly flexible.
Thanks to these characteristics, the iSIM technology is particularly suited for IoT devices in healthcare, industrial automation, and fleet management, where physical access to the device is difficult or costly. It enables the secure, flexible, and cost-efficient connection of millions of devices globally.
Advantages and disadvantages of iSIM technology for businesses
The integrated SIM offers significant advantages to businesses, particularly in managing and integrating IoT systems. However, the technology also presents challenges that may complicate the implementation process. In the following table, we outline the pros and cons of iSIMs.
Advantages
Reduced operating costs
With the SIM integrated into the chipset, costs for physical SIM cards and their replacement are eliminated.
Enhanced security
The iSIM is built into the device, making tampering difficult and preventing data theft.
Less space required
Without the need for a physical SIM card, devices can be more compact, which is especially beneficial for small IoT devices.
Better energy efficiency
Integrated SIMs save energy as there is no need to power a separate communication unit.
Simple management
SIM profiles can be managed, updated, and swapped remotely, saving time and costs, particularly for large fleets of devices.
Global deployment possibilities
Globally operating Businesses manage and connect devices worldwide without requiring physical access.
Disadvantages
Dependency on manufacturers
Companies have to rely on manufacturers that offer chipsets with integrated SIMs.
Limited flexibility
Since the iSIM is embedded within the device, it cannot be transferred when switching devices.
Higher initial costs
The implementation of integrated SIMs can be more expensive than traditional SIM cards.
Complex integration
Implementing the iSIMs in existing systems requires technical adjustments and specialized expertise.
Companies can overcome these challenges through careful planning and the selection of suitable providers. Key criteria when choosing a provider include network coverage, management tools, and support services to ensure the iSIM can be optimally incorporated into both current and future IoT strategies.
Challenges and Security Aspects of integrated SIM cards
One of the biggest obstacles in embedding the integrated SIM into corporate processes is ensuring IT security. Risks like cyberattacks and software flaws cannot be entirely ruled out.
However, the technology uses various security mechanisms to reduce these risks, such as encrypted communication protocols, secure authentication methods, and the isolated security areas (Secure Elements) within the chipset. These measures protect the stored data from unauthorized access. Additionally, companies should also adopt further security measures, including regular software updates, the use of secure networks, and multifactor authentication.
Conclusion: Integrated SIMs will be essential for successful business strategies
The iSIM simplifies the management and security of IoT applications, reduces operating costs, and saves space in devices. Companies should consider adopting integrated SIMs if flexibility and security are key factors for their IoT projects. However, a careful analysis of factors such as greater initial investment and manufacturer dependency is crucial to successfully implementing the iSIM technology.
What does iSIM stand for?
iSIM is the term for integrated SIM cards.
What is an integrated SIM?
An iSIM is a SIM card built into the device's chipset which replaces physical SIM cards.
How does the iSIM work?
An integrated SIM card stores all SIM data securely and connects the device directly with the network, offering increased security and saving space.
What is the difference between eSIM and iSIM?
Both SIMs are integrated into the device, but while the eSIM is soldered onto the chip, the integrated SIM is already embedded in the main chipset.