Some IoT devices have embedded SIMs (eSIMs) – SIMs that are embedded into the device during the manufacturing process. While this prevents a device’s owner from replacing the SIM with a new one, it makes it easier to deploy the IoT device, as no SIM needs to be installed when it is in the field. eSIMs are not unique to IoT devices – smartphones can also have eSIMs.  Note that, because they can’t be removed, most eSIMs are Global SIMs.This means they can either be manually or automatically configured to connect to different MNO networks than the one they are first assigned to.