The eSIM format is commonly designated MFF2. The surface mount format provides the same electrical interface as the full size, 2FF, 3FF and 4FF SIM cards but is soldered to a circuit board as part of the manufacturing process. Networking solutions using eSIM technology can be widely applied to various Internet of Things (IoT) scenarios, including connected cars (smart rearview mirrors, on-board diagnostics (OBD), vehicle Wi-Fi hotspots), artificial intelligence translators, MiFi devices, smart earphones, smart metering, GPS tracking units, DTU, bike-sharing, advertising players, video surveillance devices, etc. GSMA defines eSIM as the SIM for the next generation of connected consumer devices. ĮSIM is a global specification by the GSMA that enables remote SIM provisioning of any mobile device. An eSIM can be provisioned remotely end-users can add or remove operators without the need to physically swap a SIM from the device. It improves reliability and network security, while also reducing space requirements, since a relatively bulky connector is not needed, increasing design flexibility.

In machine-to-machine (M2M) applications, where there is no requirement to change the SIM card, this avoids the requirement for a connector.

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