What is an iSim?

Are you curious about iSIM and its implications for IoT connectivity? In this post, we’ll explore what iSIM means, the differences between iSIM and eSIM, and where physical SIM cards fit into the connectivity landscape.

What is an integrated SIM?

An integrated SIM (iSIM) is an alternative form factor to traditional SIM cards. Instead of physically placing a SIM card into a device, as with mobile phones or IoT devices, iSIMs are embedded directly onto the device’s System-on-a-Chip (SOC). This eliminates the need for a removable SIM card and simplifies the device’s design.

What’s the Difference Between eSIMs and iSIMs?

While eSIMs are soldered to a device’s circuit board, iSIM technology integrates the SIM into a Tamper-Resistant Element (TRE) on the device’s SOC. This approach uses less power and can be activated wirelessly using a secure industry-accepted protocol, removing the need for specific SIM hardware.

How Does System-on-a-Chip (SOC) Work?

To understand iSIM, let’s look at how it integrates with the device’s SOC. Incorporating the SIM directly into the SOC reduces costs, simplifies manufacturing, and minimises power consumption for battery-powered devices. This integration also saves space on the printed circuit board (PCB) and reduces overall costs for enterprises and device manufacturers.

What are the Benefits of iSIM?

iSIM offers several advantages over traditional SIM technologies:

1. Size: iSIMs are small, under 1 millimeter squared, allowing for more compact device designs.
2. Security: iSIMs are integrated into the SOC’s secure enclave, making them highly resistant to tampering and unauthorised access.
3. Resources: iSIMs use less power and reduce the need for multiple components, lowering manufacturing and logistical costs.
4. Compatibility: iSIMs can connect to various network types and allow devices to switch networks over the air (OTA) based on multiple factors.
5. Use Cases: iSIMs enable new business models and applications across various industries, from utility meters to medical wearables and vehicle telematics systems.

How Does CommsCloud Use iSIM?

At CommsCloud, we have chosen to work with floLIVE and their partners Kigen and Sony Semiconductors to use their unique IMSI library with iSIM. The solution allows enterprises to access compliant, multi-network local coverage for various IoT use cases. Our multi-IMSI technology using iSIM offers cost-effectiveness, minimal footprint, and robust security and flexibility. We support a range of SIM technologies and help enterprises manage and scale their global IoT projects.

Are you interested in learning more about iSIMs?

Feel free to reach out if you want to deepen your understanding of iSIM technology. To discover how iSIM can revolutionise your IoT connectivity and unlock the full potential of connected devices, contact us at +27 21 551 5526 or  Get in Touch. You can also follow our journey across Africa with the social media links below.