Dell Edge Gateway 3001 Installation And Operation Manual page 16

NOTE: Mobile broadband antenna port two is for LTE only. It does not support 3G.
4. Connect a USB cable to connect a display, keyboard, and mouse.
5. Connect all cables to the appropriate I/O ports on the Edge Gateway.
6. Open the micro-SIM/micro-SD card access door.
7. Insert a micro-SIM card into the top micro-SIM card slot and
8. Insert a micro-SD card into the bottom micro-SD card slot.
activate your mobile broadband.
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