The nRF9160 DK is designed to support both regular Subscriber Identity Module (SIM) and Embedded SIM (eSIM). For this purpose, it has a pluggable SIM card socket (J5) that takes a nano-sized SIM (4FF) and a non-populated footprint for an eSIM (MFF2).
Using the SIM socket is the default. If an eSIM is soldered on to the Development Kit (DK), switch SW7 can be used to select the eSIM. Connector P28 can be used to connect and monitor the traffic on the SIM interface.
Figure 1. SIM card connector, eSIM, and selection switch
Note: The nano-SIM card is inserted with the electrical interface down in the SIM card holder
(J5).