RM520N Registration and ECM not working

I do get an error with the following command

AT+COPS=?

ERROR

It means that it is not registerred on the cellular network.

Was the four antennas connected?
And have you tried to swith to another SIM card?

Check with

AT+QNWPREFCFG="nr5g_disable_mode"
AT+CEREG?
AT+QENG="servingcell"

I would remove all the contexts except 1,2,3.

AT+QNWPREFCFG=“nr5g_disable_mode”

+QNWPREFCFG: “nr5g_disable_mode”,0
OK

AT+CEREG?

+CEREG: 2,1,“1955”,“0011F5D”,13
OK

AT+QENG=“servingcell”

ERROR

Well, it is registered, in home network, with E-UTRAN-NR dual connectivity.
Not sure why you don’t have proper responses to +COPS and “servingcell”.

Check the current setting with AT+QNWPREFCFG="mode_pref" and try setting it to LTE only with AT+QNWPREFCFG="mode_pref",LTE

Here are the results

AT+QNWPREFCFG=“mode_pref”

+QNWPREFCFG: “mode_pref”,AUTO
OK

AT+QNWPREFCFG=“mode_pref,LTE”

ERROR

Sorry, my mistake - it should be AT+QNWPREFCFG="mode_pref",LTE

No worries, output came out as “Ok”

Great, then reboot/restart the modem and run through the same standard checks:

AT+CEREG?
AT+CGDCONT?
AT+CGPADDR
AT+QENG="servingcell"

Also worth checking: AT+QMBNCFG="List"

For whatever reason I can get internet to when the modem is set as AT+QCFG=“usbnet”,1

It is not registerred and the PDP is not active.

how do i activate PDP and get it registered?

Show the current state, run the commands from my previous response.

With usbnet set to 1 i get the following.
AT+CEREG?

+CEREG: 0,0
OK

AT+CGDCONT?

+CGDCONT: 1,“IPV4V6”,“three.co.uk”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 2,“IPV4V6”,“ims”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 22,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 23,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 24,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 3,“IPV4V6”,“sos”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,1,“”,0
+CGDCONT: 6,“IPV4V6”,“internet”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
OK

AT+CGPADDR

+CGPADDR: 1,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 2,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 22,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 23,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 24,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 3,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 6,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”

OK

AT+QENG=“servingcell”

OK

With usbnet set to 2 i get the following.

AT+QCFG=“usbnet”

+QCFG: “usbnet”,2

AT+CGDCONT?

+CGDCONT: 1,“IPV4V6”,“three.co.uk”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 2,“IPV4V6”,“ims”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 22,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 23,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 24,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 3,“IPV4V6”,“sos”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,1,“”,0
+CGDCONT: 6,“IPV4V6”,“internet”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0

OK

AT+CGPADDR

+CGPADDR: 1,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 2,“42.4.74.67.0.89.29.189.0.0.0.0.101.252.45.165”
+CGPADDR: 22,“10.95.163.243”
+CGPADDR: 23,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 24,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 3,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 6,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”

OK

AT+QENG=“servingcell”

+QENG: “servingcell”,“NOCONN”
+QENG: “LTE”,“FDD”,234,20,11F5D,458,9360,28,3,3,1955,-91,-10,-63,12,7,225,-
+QENG: “NR5G-NSA”,234,20,791,-112,5,-11,641376,78,12,1

OK