eSIM (embedded-SIM)

An embedded-SIM (eSIM) or embedded universal integrated circuit card (eUICC) is a form of programmable SIM card that is embedded directly into a device.

In machine to machine (M2M) applications where there is no requirement to change the SIM card, this avoids the requirement for a connector, improving reliability and security. An eSIM can be provisioned remotely; end-users can add or remove operators without the need to physically swap a SIM from the device.

eSIM is a global specification by the GSMA which enables remote SIM provisioning of any mobile device, and GSMA defines eSIM as the SIM for the next generation of connected consumer device, and networking solution using eSIM technology can be widely applicable to various Internet of things (IoT) scenarios, including connected cars (smart rearview mirrors, on-board diagnostics (OBD), vehicle hotspots), artificial intelligence translators, MiFi devices, smart earphones, smart metering, car trackers, DTU, bike-sharing, advertising players, video surveillance devices, etc.

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. The eSIM format is commonly designated as MFF2.