An eSIM (embedded SIM) is a chip permanently installed in the device that takes over the function of a classic M2M SIM card. Unlike a physical SIM card, the eSIM is not replaced but programmed digitally.
Unlike the classic SIM card, which comes as a chip on a plastic carrier, the embedded SIM is simply a chip that is permanently installed in the end device. It measures around 5 x 6 millimetres and completely dispenses with the familiar plastic carrier. Instead, it is soldered in during production so that it is no longer necessary to insert a SIM card into the end device. This technology is playing an increasingly important role in M2M communication, as it is transforming the networking of devices and creating new opportunities for IoT applications and IoT communication. The data for using the mobile network is uploaded via an electronic profile, typically using over-the-air methods.
Space-saving: As the embedded SIM is soldered directly into the device, it takes up much less space in the end device than a conventional SIM card. This means that end devices can be designed much more compactly. The space that would otherwise be required for the M2M SIM and the SIM card slot can be used for other purposes or eliminated altogether.
Always the right format: SIM cards are available in different formats, but the eSIM is always the same. With an eSIM, there is no need to consider which SIM format would be necessary for the device.
Resource-saving: An eSIM comes without a plastic carrier or packaging. This saves plastic waste and protects the environment. In addition, the SIM does not have to be sent to the user independently of the product, like a classic SIM card. This saves additional emissions for delivery.
Ready to use immediately: Instead of waiting for a SIM card to be delivered by post and then inserted into the end device, the eSIM can be used immediately. The network operator data is transferred digitally and the device is ready for use.
Mechanical security: Because the eSIM is soldered to the circuit board of the end device, it is virtually impossible to steal the SIM card and misuse it. The eSIM is also less vulnerable in environments with strong movements. A classic SIM card, for example, could slip in the SIM card slot and thus break the connection. This risk is eliminated with an eSIM. This is particularly important in IoT and M2M projects where the end device is in motion a lot. For example, our eSIMs are installed in e-bike batteries from the company AES. This company supplies the bicycle batteries for Deutsche Post.
