For GSM connections, the RediGate 400 uses a standard SIM card (also referred to as Mini-SIM). The steps below show how to install the SIM card:
Remove power and all connectors from the front panel of the RediGate.
Remove the rubber end cap and the five mounting screws from the front faceplate.
Gently slide the RediGate out of its enclosure about 5 inches (127 mm) to expose the SIM card slot. Do not remove the processor entirely from the enclosure.
Fully insert the SIM card into the SIM card slot, with the metal contacts facing down and the angled edge facing out.
Example of AT&T's IoT Sim card installed in a RediGate (note the three embedded SIM sizes: Mini, Micro, and Nano):
Gently slide the RediGate back into its enclosure and carefully replace the five mounting screws to avoid over-tightening.
Replace the rubber end cap and all front panel connectors.