How eIM for IoT Unlocks Scalable, Vendor-Agnostic eSIM Management

When IoT tech is run on legacy networks, it inevitably runs into physical SIM constraints and rigidly entrenched frameworks, causing severe scalability bottlenecks and risky vendor lock-in for global deployments.  

In this article, we’re looking at what causes these issues, how the recently introduced GSMA SGP.32 standard overcomes them with the eSIM IoT Manager (eIM), and taking a look at the advanced orchestration layer that’s enabling automated, Zero Touch fleet provisioning for hyper-scalable, multi-operator flexibility. 

New Tech, Old Problems

In the early 1920s, telephones were the next big thing. After a slow first couple of decades, typical of any product that requires a user-base to gain traction, demand started to skyrocket and American company AT&T almost immediately discovered themselves in one of the earliest examples of a catastrophic scalability bottleneck.  

The company had grown so fast and was meeting such high demand that it’s manual telephone exchanges rapidly became the largest employer of women in the entire United States. Switchboard operation was the most common job for American women, and manual operators were ubiquitous in every city across the country. 

But business math was clear: their network was growing so fast that they were very soon going to run out of young women to hire well before demand topped out. Their communication system was inherently unscalable.  

To survive and grow, AT&T had to commit to what was at the time the largest automation investment in history, upgrading their switchboards to rotary dial phones and replacing about half of the entire American wired communication network inside of 15 years.   

Today, the episode is taught in both business and engineering colleges, considered a perfect illustration of what happens when system design creates an artificial ceiling on its own growth. 

Some lessons have been learned better than others, as today’s telco environment is currently facing some remarkably similar paradigm shifts.  

IoT tech has pushed cellular networks well beyond the point where they just had to handle a few million humans on smartphones, creating a market where demand may come fromseveral billion autonomous devices all demanding constant, flexible network access.  

While it’s been a while since operators asked you how they might connect your call, the digital ecosphere spent a long time being underpinned by technology not so far off a physical switchboard, in the shape of a physical SIM card.  

Just as those AT&T executives did the math and saw that manual operators couldn't sustain global telco expansion, modern enterprises are similarly realizing legacy connectivity management simply can't support the fearsome velocity of the IoT era. 

When every fleet tracker or smart meter requires proprietary integrations or physical intervention when a contract changes, the system simply can't scale.  

By the late 2010s the digital marketplace desperately needed its own version of a mechanized, electronically driven rotary dial for new device connectivity, which is exactly why eIM for IoT was developed. It permanently severs the link between physical hardware constraints and global connectivity demands. 

Scaling IoT Connectivity

Managing global IoT fleets with traditional SIM architecture is by now a non-starter, especially as deployments expand across legal jurisdictions and regional networks, all while fleets get longer-lived and more mobile.  

When backend infrastructure can't keep pace with the speed of business, the physical operations reliant upon it inevitably grind to a halt. Much as AT&T’s old problems serve as a teachable moment for network engineers, there’s a more recent example used by logisticians in the supply-chain collapse that hit Sainsburys in the early 2000s.  

The UK supermarket chain was quite sensibly investing in its own high-tech future, embarking on a massive €3.5 billion automation project. It was to revolutionize its entire supply chain, using barcode scanners and smart inventory systems. The original project, outsourced to IT giant Accenture, was part of a larger Business Transformation Programme initially championed by CEO Sir Peter Davis.  

Sir Davis very publicly announced in 2003 that the project had already saved massive amounts of capital. But behind the scenes things were falling apart at the kind of speed only possible with new technology doing the wrong thing. Transparency was non-existent, communication utterly siloed across different teams, and the automated systems were fundamentally failing to sync with the human and physical reality in the warehouse.  

Scanners misread labels, stock records were fictional, and critical delays proliferated up and down the chain, leading to the company's first financial loss in over a century. The retailer was forced to write off €163 million in IT assets and another €140 million in automated distribution systems. To add very expensive insult to very expensive injury, Sainsburys had to spend a further €645 million to undo the failed transformation, regain control, axe 750 head-office jobs and panic-hire 3,000 staff to restock empty shelves.  

Sir Davis’s position was not among the 750 jobs lost, and he instead enjoyed a £2.3 million performance bonus, despite some rather unhappy shareholders.  

Regardless of blame, the important lesson for both logisticians and the IoT sector is that if your connectivity management can't scale to handle a massive deployment of smart sensors, meters or trackers, then your physical assets (e.g Sainsbury's whole inventory) become effectively stranded.  

Under the old ‘Machine-to-Machine’ SGP.02 standard, remote provisioning relied on rigid Subscription Manager Secure Routing (SM-SR) architecture that needed deep, expensive technical integrations for every network change. Without a sophisticated and field-tested mechanism for IoT eSIM management at scale, organizations trying to manage globally dispersed connected devices will at best end up facing elevated costs and at worst full operational meltdown. 

Why eIM and SGP.32 Matters

Having been savvy enough to see these scaling limitations coming, the GSMA developed a new architecture tailored specifically for the rise of modern, resource-constrained device deployments. The eSIM IoT Manager (eIM), as defined by GSMA SGP.32, introduces a purpose-built orchestration layer for IoT that enables the fully remote, hyper-scalable, API-driven management of eSIM profiles.  

Under the slightly earlier consumer model (SGP.22), a human user gets the whole connectivity process underway by tapping a screen or scanning a QR code to download a carrier profile.  

Because an IoT tracker embedded in a concrete duct or the stomach of wandering livestock doesn't have the luxury of a touchscreen, the GSMA SGP.32 spec removed that initial connection request from the physical device and relocated it into the cloud. The eIM acts as the central overseer and conductor, issuing standardized commands across entire fleets without requiring any local prompting. 

In terms of architecture, the eSIM IoT Manager SGP.32 relies on three core components -  the eIM serving as the control layer, the IoT Profile Assistant (IPA) acting as the execution layer on the device or chip, and the eUICC hardware securely storing the operator profiles.  

Crucially this setup also eliminated the old M2M standard's need to receive an SMS trigger, which aside from not being hugely reliable was also increasingly incompatible with new low-power tech like NB-IoT, which considers SMS as extravagantly wasteful in terms of battery-life.  

Instead, SGP.32 supports a wide range of lightweight transport protocols designed explicitly for maximizing the lifespan of constrained devices, such as CoAP, UDP, and DTLS. These streamlined protocols drastically reduce the power cost of signalling, conserving precious battery life and minimizing data consumption.  

Meanwhile, the spec also uses optimized profile templates that cut down on the size of the telco profiles that need to be downloaded over the air. By replacing the comparatively clunky SMS integrations with highly efficient IP protocols, the architecture ensures that managing fleets in the millions is effectively no more complicated than managing a single unit. 

From Provisioning to Full Lifecycle Control

eIM shifts IoT connectivity from being dependent on manual provisioning to having the ability to automate full fleet orchestration, remote profile management, bulk rule-based operations, and real-time control.  

Until recently, operating IoT devices internationally meant OEMs had to maintain multiple localized hardware variants, and deploying to any specific market entailed physically soldering that region-specific SIM into each unit. The new SGP.32 spec eradicated this tangle of warehousing and SKU tracking by enabling Zero Touch Provisioning. Manufacturers can now design a single global unit, where every device rolls off the assembly line with an identical eUICC containing a pre-installed bootstrap profile. 

This bootstrap provides a short burst of initial connectivity, available anywhere in the world, to allow the device's IPA to securely contact the eIM as soon as it's powered on. Based on predefined list of preferred networks, the eIM is instrumental in sourcing and pushing a localized operational profile down to the device. Once the main local connection is active, the bootstrap profile is deactivated and archived, staying dormant but ready as a failsafe. 

This remote eSIM provisioning of IoT protocols enables far more detailed lifecycle control through Profile State Management Operations (PSMOs). These state management commands are cryptographically authenticated, guaranteeing secure binding between the eIM and the eUICC to prevent intrusion. Because the eIM handles bulk operations at the individual device level, admins can execute connectivity changes across thousands of devices simultaneously.  

If a telco contract expires, a better offer comes along or a network drops out entirely, comprehensive eSIM fleet management IoT platforms can instantly trigger mass profile swaps from the cloud, ensuring devices switch to new networks and continue transmitting without missing a beat. 

Escaping Lock-In

By decoupling connectivity from hardware, eIM allows enterprises to switch data contracts without replacing their SIMs or devices, unlocking a whole new playing field of flexibility and competitive, multi-operator strategies.  

For decades, getting stuck with the wrong connectivity agreement was far more than just a nuisance for the nascent IoT industry. To get an idea of how severe the damage of technological lock-in can be, it’s worth recalling the problems faced in the early 2010s by European sovereign cloud initiatives like France's Andromède or Germany's Bundescloud.  

Back when it was still a new concept, national governments tried to compel their main national carriers to build their own specialized local cloud platforms to avoid relying on U.S. giants. The French government even backed the Andromède project to the tune of €150 million, only to see them fail due to lacking the economies of scale and the interoperable know-how that global, vendor-agnostic platforms possessed.  

These sovereign cloud initiatives quickly became bogged down by proprietary limitations, extra security layers like mandatory SecNumCloud certifications, and intra-industry disagreements that were as bitter as they were predictable, ultimately making them too slow and uncompetitive to scale. This played very publicly on a national stage, and serves as an exact example of what happens privately when an IoT deployment is locked into a single operator's proprietary ecosystem, such as the old M2M standards, and finds itself unable to take advantage of global economies of scale. 

Under the old SGP.02 M2M standards, the SM-SR component was tightly integrated with both the eSIM provisioning platform and the initial network operator. Changing providers meant the original operator had to participate in a complex technical handover protocol that they had very little commercial incentive for doing willingly, leaving enterprises shackled to uncompetitive rates and poor regional coverage.  

eIM acts as a great leveller, allowing businesses to swap around profiles without getting trapped in any one localized, unscalable technology silo. The standard explicitly requires that any eIM can orchestrate provisioning  with any certified SM-DP+ without relying on cumbersome pre-negotiated handshakes or routing agreements. It's designed specifically to empower enterprises to negotiate purely on the good old commercial merits of coverage, cost, and service quality.

If an operator doesn't deliver, the enterprise simply pushes a new profile from a competitor, maintaining true multi-operator IoT connectivity while far more effectively preserving their digital sovereignty over their backend assets than government-run national clouds. 

Operational Benefits of eIM

For enterprises, eIM offer an attractive combination of simpler global deployments and lower costs, new service models and greater control over their device’s lifecycle, plus significantly improved TCO by standardizing single-SKU manufacturing, simplified inventory management, and cutting the cost of inevitably misallocated hardware.  

The ability to dynamically switch to local network profiles also lets organizations easily bypass permanent roaming restrictions, which was becoming an increasingly pressing issue as more and more regions were banning long-term data roaming on foreign SIMs. 

Meanwhile, the technical efficiencies of CoAP and UDP protocols enabled by SGP.32 mean that edge devices consume far less data and therefore power during the critical provisioning phase. It’s a difference measurable in fractions of a milliwatt, but this makes all the difference to the new generation of hyper-efficient and long-lived battery devices.  

Prolonging battery life means extending the operational lifespan of the remote asset, delaying costly hardware replacement cycles and driving a global eSIM market that Juniper Research projects will grow to €15 billion by 2027.  

The new standards, leveraging eSIM and eIM, allow smaller and more specialized OEMs and regional MVNOs who may lack the deep pockets of entrenched players to take full advantage of hyper-growth by providing simplified integration with Connectivity Management Platforms.  

For MNOs, this architecture presents an opportunity to deploy advanced, commercially popular service models. Operators no longer need worry about the logistics of printing, packaging, and shipping millions of plastic SIM cards across the globe. Using cloud-native SM-DP+ infrastructure, telco providers can provision profiles synchronously in real-time, executing complex connectivity requests in timeframes that human users would consider instant.  

This enables highly automated, reseller-friendly platforms where downstream partners can be granted direct API access to manage their own subscriber bases, effectively instantly. Rather than fighting to keep customers from rebelling over being locked into rigid hardware families, savvy operators are leveraging eIM to compete dynamically on pure elevated service quality. 

A Software-defined Foundation

With long device lifecycles and evolving network needs, eIM is creating a market where connectivity is fully remote, adaptable, and interoperable at scale. The automotive sector is a neat example for seeing the direction of travel. The industry is rapidly pivoting toward the Software-Defined Vehicle (SDV), where a car's ongoing value is informed by onboard software capabilities rather than just its mechanical components. Modern telematics, autonomous driving systems, and OTA infotainment updates ravenously consume bandwidth, adding up to a lot of data and therefore a lot of custom over a vehicle's long lifespan. 

With the obvious exception of 1GLOBAL, it's unfortunately impossible to predict which telco operators will offer the best coverage, the lowest latency, and the best pricing a decade from now.  

This would be a huge problem for any manufacturer building connectivity into a product that’s expected to last at least ten years, if they couldn’t then change that connection. SGP.32 allows automotive manufacturers to utilize In-Factory Profile Provisioning to rapidly inject standardized profiles during assembly via secure Wi-Fi or private 5G networks, ensuring the production line never stops moving and relying on the eIM to take over when the vehicle reaches its new home. 

This paradigm of connectivity-as-software is spreading rapidly across all industrial sectors. Integrating an advanced management platform ensures connectivity rules can be dynamically linked directly to broader strategy goals rather than just “is there any reception here?”.  

A global logistics company can easily set their systems to automatically trigger a profile swap on a refrigerated shipping container the moment it crosses an international border, ensuring it always uses the optimal network without needing oversight. The tech doesn't just manage SIMs passively, but allows connectivity to react intelligently to real-time business events and become a live asset for a business. 

Power your IoT Strategy with 1GLOBAL

1GLOBAL’s IoT connectivity and eIM-ready platform will enable you to deploy, manage, and scale global fleets with flexibility, resilience, and full control.  

Any deployment is only as successful as its initial connection allows, and 1GLOBAL ensures it by pre-loading highly robust, multi-IMSI bootstrap profiles on to every eSIM. Because 1GLOBAL operates a unique network-of-networks encompassing direct agreements with 600+ partners across 190+ countries, these bootstrap profiles ensure devices can wake up and immediately get connected practically anywhere on the planet. This vast coverage prevents the immediate and terminal failure of a device being unable to reach its eIM upon deployment. 

Beyond the hardware, an expert IoT connectivity management platform is essential to orchestrate these connections. By leveraging our own GSMA-certified SM-DP+ infrastructure, 1GLOBAL delivers a highly sophisticated control center where Admins can oversee their entire global estate through an intuitively unified dashboard.  

This centralized portal is rich with advanced capabilities, including dynamic automation rules, real-time traffic analytics, IP address management, comprehensive audit trails, and deep troubleshooting tools.  

Once an eSIM is deployed via MDM to an enterprise device anywhere on the planet, 1GLOBAL’s solutions provide complete control without fiddling around registering 32-digit-long EID numbers, as it's all securely controlled by the profile and IDM. The process is simple and effectively instant, and an enterprise can add units one at a time or by the million, certain that the right localized profile will be going to the right device, all while the service is automatically billed from the correct country, integrated into a single simple worldwide agreement. 

When evaluating global IoT connectivity solutions, it's essential to partner with a provider that understands the value of interoperability. Enterprises can easily secure multi-operator capabilities by integrating 1GLOBAL's robust API ecosystem, allowing telco management to become an automated, intuitive extension of their existing IT infrastructure.  

While the digital era demands agility, businesses today won’t need to take quite such drastic action as AT&T did in the Jazz Era, replacing half of the electronic infrastructure in existence to escape their impending bottleneck doom.

Contact 1GLOBAL is learn more about how we provide the software-driven intelligence necessary to confidently scale connected IoT assets across the globe.