01.11.22, 14:00
Align the direction of the SIM card and the placement of the diagonal edge based on the diagram
beside the SIM card slot.
Make sure the SIM card is fully inserted into the slot.
https://www.watchguard.com/help/docs/help-center/en-US/Content/en-US/Hardware-Guides/firebox-t80-hardware-guide.html?cshid=10002
Firebox T80 Hardware Guide
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