Ensuring universal interoperability right from the start of SGP.32

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As IoT connections grow, the GSMA’s SGP.32 standard is playing a key role in enabling zero-touch eSIM provisioning for connected devices. But as many companies begin to implement the specification, an often-overlooked technical detail is creating surprise challenges in real-world deployments, especially, when it comes to interoperability between devices and SM-DP+ platform operations.

SGP.32 devices designed for fully automated provisioning typically use IPAe (IoT Profile Assistant on the eSIM) logic and communicate in ASN.1, a message format that differs from the JSON used in most consumer eSIM flows. The issue? Many commercial SM-DP+ platforms today still only support JSON, having been originally built for smartphones, tablets, and wearables.

This doesn’t mean anything is broken, just that not all infrastructure is yet fully aligned with newer IoT-specific standards. And it’s something that often only becomes apparent during integration or live testing.

Real-world impact

In discussions across the industry, and within our own clients, we’ve seen examples where well-known platforms did not initially support ASN.1. Some providers have added ASN.1 support, but coverage isn’t always consistent. You could say that the gap only becomes visible when you do broader interoperability testing.

This variability makes it difficult for OEMs and service providers to know in advance whether their SGP.32 devices will be fully supported across all SM-DP+ environments.

A practical, future-proof approach

To address this, Trasna developed has a more flexible solution. Instead of waiting for every SM-DP+ to upgrade, our eSIM IoT Manager (eIM) includes a built-in middleware layer that ensures compatibility regardless of the SM-DP+’s message format.

This smart translation layer dynamically bridges JSON-only SM-DP+ servers with ASN.1-based IoT devices, while preserving full security compliance and protocol integrity.

With Trasna’s eSIM IoT solution you have no such challenges:

• Works out of the box with JSON-based SM-DP+ systems
• No changes required to eUICC or device firmware
• Zero-touch provisioning for globally-deployed, single-SKU devices
• Faster rollout, no need to wait for ASN.1 support
• Certified to GSMA SAS standards, enabling scalable and secure deployments

Enabling true interoperability

The GSMA’s SGP.32 standard was designed to accelerate eSIM IoT adoption by leveraging the existing SM-DP+ ecosystem. With the right tools in place, that vision is well within reach.

At Trasna, we’re here to help realise that reality and ensure you can grow your business with confidence, knowing your devices will connect, provision, and operate as expected, whatever they are and wherever they go.