What are IoT SIMs?


Date: 20 October 2021

IoT SIM cars

The creation of the IoT SIM card (a variation of the standard SIM meant to store user information and link mobile phones to cellular networks) has been spurred on by the expansion of the Internet of Things (IoT) and its specific demands.

IoT devices function without human intervention, communicating with other machines rather than people. IoT installations require a reliable, flexible, and secure network connection, which can contain hundreds or even millions of devices. These criteria are taken into account while creating IoT SIM cards.

An IoT SIM card's map

The contact chip encased in protective plastic is the most crucial component of a typical SIM card. A processor with 16–256 KB of electronically erasable, programmed read-only memory (EEPROM), as well as variable quantities of read-only memory (ROM) and random access memory (RAM), is included on the chip (RAM).

Designed initially to validate users on consumer mobile networks, the SIM now serves as a storage bank for unique information about the device, such as authentication credentials and provider data, as well as a key for cellular network access.

IoT applications

By 2025, the number of linked IoT devices is anticipated to increase from 7 billion to 21 billion. Hardware manufacturers are creating SIM card variations with IoT applications in mind. Industrial-grade IoT SIM cards are designed to work in temperatures ranging from -40°C to 105°C, making them ideal for emergency response, weather monitoring, and industrial IoT applications (IIoT).

IoT SIM cards serve a role that is distinct from regular mobile phone SIM cards. They connect connected devices to the cloud, allowing data to be aggregated and made accessible via an IoT management platform.

IoT SIM cards give additional flexibility and assistance in the following areas, with an emphasis on managing large groups of devices:

Data usage

Because IoT SIM cards collect and transmit data at various rates in different deployment scenarios, connection service providers usually provide aggregated data packages suited to the company's unique needs. It allows the whole fleet of devices to draw from a single data consumption limit.


IoT devices may be difficult to access once they've been deployed, for example, deep below ground in a mine or linked to a buoy in the ocean. As a result, long-term viability is critical to IoT devices and their components, including the SIM.

Removable industrial-grade IoT SIM cards enhance durability and endurance, but the eSIM is ideal for hard-to-reach deployments as they are designed to endure throughout the lifespan of the device in which it is installed.

Global reach

Traditional SIM cards are restricted to a single network in your own country. They are also subject to regional laws and restrictions. If you expand into a new country, you'll need to buy and distribute SIM cards compatible with the new area. Each time you enter a new territory, this procedure would have to be repeated. An IoT SIM card allows you to connect numerous networks in different countries, giving you a worldwide reach. Your devices will automatically connect to the strongest available network using this technique.


The invention of the SIM card made cloning mobile phones impossible, adding another layer of protection to the cellular network. IoT SIM cards may now be integrated into devices during manufacture, making them considerably more difficult to access and tamper with for unauthorised usage.

An IoT SIM is the most straightforward method to get started, scale, and manage your connected IoT devices from anywhere, at any size. Reliable connectivity is vital to the success of any IoT solution.

If you have any concerns concerning IoT SIM card management, the specialists at Freeeway is an excellent place to start.

Copyright 2021. Sponsored guest post.

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