// Future
The Future of eSIM: From Smartphones to a Billion IoT Devices
The eSIM started as a convenience for smartphones. It is becoming something far bigger: the connectivity layer for a world of tens of billions of connected things. This article looks ahead — at where eSIM (and its IoT sibling, iSIM) is going, and what it means for device makers, operators and anyone selling connectivity.
From a feature to a foundation
In phones, eSIM is now mainstream — some flagship models have dropped the physical SIM tray entirely. But the more profound shift is in machines. Analysts expect billions of IoT devices to rely on embedded SIM technology this decade, because the benefits compound at scale: no swaps, remote management, durability and instant provisioning. If you are new to the topic, our primer on the eSIM revolution sets the scene, and what IoT connectivity is covers the basics.
Trend 1: iSIM and the disappearing chip
The next step beyond eSIM is iSIM — integrating the SIM directly into the device’s main processor (the SoC). That means no separate chip at all: lower cost, smaller footprint and less power. For tiny, battery-powered sensors shipped in the millions, iSIM could be the tipping point that makes cellular the default even for the smallest devices.
Trend 2: software-defined, multi-network by default
As remote provisioning matures, carrying multiple profiles and switching intelligently becomes standard rather than exotic. Devices will increasingly behave like the multi-network SIMs of today — choosing the best network, localising where permanent roaming demands it — all orchestrated remotely from platforms like Extrafon’s Assets Management Platform.
Trend 3: connectivity becomes a digital product
Because an eSIM profile can be delivered instantly, data plans are turning into e-commerce. Travel eSIMs already let anyone buy and install data in seconds; the same model is spreading to IoT, where a device can be activated and monetised online. The technology stack behind this — platform, APIs and store — is covered in the technology behind an eSIM store.
Trend 4: new players, new business models
Lower barriers mean more entrants. Brands, retailers and especially local operators can launch connectivity products without owning a global network — reselling and white-labelling instead. We explore how a regional carrier becomes a worldwide provider in from local MNO to global provider. Expect a wave of niche, branded and vertical-specific connectivity offers built on shared eSIM infrastructure.
Trend 5: 5G, LTE-M and NB-IoT everywhere
eSIM rides on whatever radio is best. As 5G expands and low-power LTE-M/NB-IoT blanket more regions (while 2G/3G retire), eSIM devices will simply select the right technology for the job — high bandwidth for cameras and gateways, long battery life for sensors. The SIM becomes the constant; the network underneath flexes.
What it means for you
If you make devices, design for eSIM (and keep an eye on iSIM) to avoid stranded hardware and field visits. If you sell connectivity, build on a platform that supports remote provisioning, multi-network steering and online sales. And whatever your role, choose a partner — judged by the criteria in choosing an IoT connectivity provider — that can grow from your first device to your millionth.
The bottom line
The eSIM’s future is not a slightly better SIM card — it is connectivity dissolving into software and silicon, spreading from phones to a vast, varied universe of things. Embedded, integrated, multi-network and instantly sellable, it will make “connect anything, anywhere, instantly” the baseline expectation. The winners will be those who build on that foundation early.