Embedded SIM (eSIM) definition
Embedded SIM (eSIM) means machine-to-machine form factor (MFF2). It is soldered directly to the M2M device’s motherboard, fully encased in the device. The eSIM is the hardware component of the SIM and a physical form that can be soldered into a solution. On the other hand, eUICC refers to the software component of eSIM that provides the capability to store multiple network profiles that can be provisioned and managed Over-the-Air (OTA).