Can't set the modem + SIM to work in LTE/4G mode

Technical Subjects Driver
1

Hi,

I am using a modem EM060KEA; It seems I have configured everything, including APN.
However, when I check with ‘AT+CEREG’ and ‘AT+CGREG’, I see that the modem is configured with a 2G/3G network, not an LTE network. And it’s not assigned an IP for accessing the internet.

OpenWrt:~# at_cmd ‘AT+CEREG?’ 1
AT+CEREG?
+CEREG: 1,0
OK
OpenWrt:~# at_cmd ‘AT+CGREG?’ 1
AT+CGREG?
+CGREG: 1,1
OK

I have tried setting AT+QCFG=“nwscanmode”,3’ to force it to work with 4G, but it got an error. It seems the command nwscanmode is not supported.

More details:
Query ICCID (SIM card identifier)
AT+QCCID
+QCCID: 89610185003222165111
OK

Query PIN status
AT+CPIN?
+CPIN: READY
OK

Check network registration status
AT+CREG?
+CREG: 1,1
OK

Check PDP context activation state
AT+CGACT?
+CGACT: 1,0
OK

Check the APN configuration
AT+CGDCONT?
+CGDCONT: 1,“IP”,“telstra.internet”,“0.0.0.0”,0,0,0,0
OK

Query signal quality
AT+CSQ
+CSQ: 9,99
OK

Query operator selection
AT+COPS?
+COPS: 0,0,“Telstra Telstra”,2
OK

Query GPRS attachment status
AT+CGATT?
+CGATT: 1
OK

Check the assigned IP address
AT+CGPADDR=1
+CGPADDR: 1,“”
OK

2

Please try the alternative: AT+COPS=0,,,7

1 Like
3

Thanks. Not only that command, I figured out that using SIMs requires other APNs although provided by the same ISP.

4

What does AT+QMBNCFG="List" return? Any active Telstra MBN file there is likely setting the APN to “telstra.internet” on any SIM change.

5

+QMBNCFG: “List”,0,1,1,“Telstra_Australia_Commercial”,0x08010800,202309131

+QMBNCFG: “List”,1,0,0,“ROW_Generic_3GPP”,0x08010809,202302081

+QMBNCFG: “List”,2,0,0,“Volte_OpenMkt-Commercial-CMCC”,0x08012010,202002061

+QMBNCFG: “List”,3,0,0,“VoLTE_OPNMKT_CT”,0x080113E0,201912191

+QMBNCFG: “List”,4,0,0,“VoLTE-CU”,0x08011561,202304261

+QMBNCFG: “List”,5,0,0,“ROW_Generic_3GPP_PTCRB_GCF”,0x0801FE02,202302081

6

That one is selected and active.

Is it causing you a problem? Or can you easily configure the APN you want?

7

The problem is we have two types of Telstra SIMs and one type use telstra.internet and another type use telstra.m2m. At the beginning, we don’t know that we are using the second type so that making wrong configuration on the modem for APN.

8

Can you differentiate by the IMSI or ICCID range perhaps?

IMSI via AT+CIMI while ICCID might need a decode.