Mikrotik KNOT with AT&T IoT LTE-M US Data Plan

Hi All,

I am very new to Mikrotik and was just following a video on how to activate LTE on my MikroTik KNOT. The SIM has been activated however I am getting the following error
Current Operator: Error (n/a)
Access Technology: Error
(see pic attached)
2022-04-05_16-00.png

Please make sure that you have an external CAT-M/NB-IoT antenna connected to the KNOT’s SMA.

If you still have issues and you are certain that another device works perfectly fine in the same location using the same SIM card, please create a support ticket for us.