Why Should You Use an iSIM for IoT Connectivity?
Written by: Jason Segarra
Published: January 24, 2025
Whether it’s their first consideration or a last minute decision, developers of IoT devices will inevitably have to evaluate SIM solutions. Though the tried-and-tested standard SIM card can accomplish the feat of securely connecting a device, newer, sleeker options such as the iSIM may present a more attractive solution for cost- and space-conscious manufacturers.
Much like the embedded or eSIM, the iSIM integrates SIM functionality directly on to a devices modem via System-on-Chip (SOC) architecture featuring its own onboard processor. This provides the lowest-profile SIM solution for a connected device, and removes the need for several components that add cost and complexity to a solution.
Let’s take a deeper look at the top 5 reasons why you should consider using an iSIM for IoT connectivity.
Space-Efficiency and Design Flexibility
The most obvious and arguably most significant advantage of iSIM technology is its ultra-compact form factor. Traditional SIM cards, even eSIMs, take up valuable space in an IoT device, which can be a major constraint in design, especially for wearables, e-textiles, or any device where space is limited. An iSIM integrates the SIM functionality directly into the device’s chipset, offering a solution that’s not only smaller than its predecessors but also eliminates the need for separate SIM components entirely.
This helps enable developers to take full advantage of miniaturization, reducing device size requirements and opening up new possibilities for both device design and functionality. The result is more compact and efficient devices that can incorporate additional sensors, a larger battery, or advanced processing power – without increasing device size.
Cost Savings and Power Efficiency
Removing the need for traditional SIM components can also yield considerable energy and cost savings when operating at scale. Fewer components means lower manufacturing costs, and a recent GSMA report suggests that this reduction in hardware complexity could be a game-changer for cost-conscious developers, particularly those responsible for large-scale IoT deployments.
Beyond cost, iSIM technology is also more power-efficient than traditional SIM options. By integrating the SIM functionality directly into the device’s chipset – and thus removing the need for an external processor – devices need to consume less power. This, in turn, extends a device’s battery life – a make-or-break factor for many remote, battery-operated IoT devices. Power savings at scale can not only lead to substantial cost savings, but also improve operational efficiency.
Enhanced Security
Security should always be a key concern for IoT developers, and iSIM technology offers a more secure solution than traditional SIM cards by embedding SIM functionality directly into a device’s chipset. This tight integration makes it functionally impossible to remove or tamper with the SIM, while providing better protection from common connectivity obstacles like vibration and dust.
Furthermore, the iSIM’s secure location within the device’s System-on-Chip (SoC) allows for more robust authentication and data encryption. iSIMs adhere to industry-standard security protocols, including the eUICC security standard, and can provide an additional layer of protection by enabling secure boot processes and trusted execution environments. The result is a much higher level of security for IoT devices, which is particularly critical in applications that handle sensitive information, such as healthcare, finance, and industrial automation applications.
Simplified Management at Scale
While controlling expansive fleets of IoT devices can be complex and costly, iSIM technology makes managing device connectivity more efficient and streamlined. Since the iSIM is embedded directly in the device’s chipset, the provisioning process becomes simpler and more flexible compared to traditional SIMs, which often require manual insertion and activation.
In addition, iSIMs support remote management, allowing for over-the-air (OTA) updates, profile swaps, and security patches. This means IoT devices with iSIM can be easily reconfigured or updated without requiring physical access to each device – something that can save time and reduce operational costs. This is particularly beneficial for industries that rely on large-scale IoT deployments, such as transportation, logistics, and energy.
Future-Proofing IoT Deployments
GSMA Intelligence expects global IoT connections to exceed 38 billion by 2030, and with this growth comes an increased demand for connectivity solutions that are efficient, scalable, and secure. With its ultra-low form factor, cost benefits, and robust security features, iSIM is well-positioned to meet these growing needs.
In fact, Counterpoint Research predicts that roughly 2.5 billion consumer devices will support iSIM technology by 2030. Beyond the consumer sector, iSIM has expanded into sectors like automotive, smart homes, and healthcare. For businesses and developers, adopting iSIM technology today can provide a competitive advantage, ensuring that their devices are ready for the future of connectivity.
Conclusion
The iSIM is more than just a smaller SIM card – it’s a transformative technology that offers significant advantages for IoT devices in terms of size, cost, security, and scalability. As the reach of the IoT continues to expand, the iSIM can help developers and businesses stay ahead of the curve, ensuring their devices are efficient, secure, and future-proof. Whether designing wearables, connected sensors, or industrial machinery, iSIM could be the connectivity solution that unlocks new possibilities and drives down costs in your IoT projects.
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