RM520N-GL setup guide and quectel-cm

Hi,

Is there a setup guide/PDF for the RM520N-GL?

I can’t get it to connect to a network properly using ModemManager, is quectel-cm available for that modem?

Yes.
You can use the quectel-CM for RM520N.

Where can I get the latest version of quectel-cm?

1.6.4 is enough.
The code can be found on the Download Zone in the Quectel website.
I will send it please check.