Network Registration Denied - +CREG: 0,3


#1

Hello:

I have been using Hologram SIM card in 2G mode with SIM800, and now I switched to SIM7000A module. I can check SIM is Ok via AT+CCID command (properly installed) but using AT+CREG? I get +CREG: 0,3 indicating Network registration denied.

Again, I’m using same SIM activated in Hologram, so I guess it should work…
BTW, GPS works fine. Both antennas (GPS and LTE) are connected.

Additional info:
with AT+COPS? i get +COPS: 0
with AT+CSQ i get +CSQ: 21,99

Any help?

Thanks


#2

I think this is something to do with Cat-M1, it is likely you are registered.

Try the AT+CGREG? command.

Note on my SARA-R410M-02 (U-Blox catM1 module, same as Nova) I have seen the 3 different registration commands (CREG for "general registration, 'CGREGfor GPRS status,CEREG` for EPS status) give 3 different registrations including CREG: 0, 3 even though CEREG gave :0, 5.

I checked on my sara R410 now that has been on and connected for ~2 days and it outputs:
at+creg?
+CREG: 2,5,“FFFE”,“889DF0F”,8

OK
at+cgreg?
+CGREG: 0,4

OK
at+cereg?
+CEREG: 2,5,"8719","889DF0F",8

OK

So your creg may eventually change over to 5, but I would also look for other indications you are registered. Or give it a bit of time especially on first registration (could take 1 hour for initial register)


#3

Thanks Andrew:

I still get the same;

AT+CGREG?

+CGREG: 0,3

Any other idea about what to do?


#4

Also tried

AT+CEREG?

+CEREG: 0,3

OK


#5

Try the following and post the results:
ATI <<prints module information
AT+CPIN? <<should return “READY”
AT+CFUN? <<checks module state, should be 1 for full functionality
AT+COPS=? <<will search for nearby networks, may take 1-3 minutes
AT+CGDCONT? <<should print the configured PDP contexts, hologram should be in this list, may show an IP if given one by the carrier
AT+CGACT? <<checks if PDP context is active

Have you left the device on for atleast 1 hour without power cycles or resets?


#6

Have you left the device on for atleast 1 hour without power cycles or >>resets?
This made the trick…
Now it works (see below)
Thanks

ATI

SIM7000A R1351

OK
AT+CPIN?

+CPIN: READY

OK
AT+CFUN?

+CFUN: 1

OK
AT+COPS=?

+COPS: (2,“AT&T”,“AT&T”,“310410”,8),(1,“313 100”,“313 100”,“313100”,8),(0,1,2,3,4),(0,1,2)

OK
AT+CGDCONT?

+CGDCONT: 1,“IP”,“hologram”,“0.0.0.0”,0,0,0,0
+CGDCONT: 13,“IP”,“hologram”,“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
+CGDCONT: 3,“IPV4V6”,“sos”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,1

OK
AT+CGACT?

+CGACT: 1,1
+CGACT: 13,0
+CGACT: 2,0
+CGACT: 3,0

OK
AT+CREG?

+CREG: 0,5

OK


closed #7

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