To be specific, when I use Nova + Hologram SIM and do AT+COPS=?, I can see my own network listed as (1, “901 70”, “901 70”, “90170”, 7). However, when I use Nova + my blank SIM, this network is not listed. As a matter of fact, I can only see NB-IoT networks with Nova+blank SIM, i.e. (*, *, *, *, 9). I’m wondering what makes the difference and is there anything I should setup on my SIM to make it work.
I’ve tried all AT commands in your diagnostics page. I also explored some more AT commands regarding SIM from an official ublox document. No luck so far.
Any help will be greatly appreciated!