BG95-M3 cannot register LTE NW

IoT Modules LPWA Module
1

Hi Sirs,
Could you please help to check below:

I can connect to GSM NW and get servingcell information, but i get some issues with LTE only as below:

  1. Execute “AT+QENG=“SERVINGCELL””, it will prompt “search” or “LIMSRV”, but there are connecting to NBIoT after execute “AT+QNWINFO”.
  2. QPING returns “OK, +QPING: 561”, Does it mean that internet is ok?

SIM card is China mobile.

GSM:
[10:10:11.647]收←◆AT+QGMR
BG95M3LAR02A04_01.003.01.003
[10:10:16.839]收←◆AT+CGDCONT?
+CGDCONT: 1,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0
[10:10:22.476]收←◆AT+QENG=“SERVINGCELL”
+QENG: “servingcell”,“NOCONN”,“GSM”,460,00,3375,9D95,20,58,-80,255,255,0,23,123,1,
[10:10:24.180]收←◆AT+QNWINFO
+QNWINFO: “EDGE”,“46000”,“GSM 900”,58
[10:10:25.841]收←◆AT+CSQ
+CSQ: 16,0
[10:10:29.784]收←◆AT+QCFG=“nwscanmode”
+QCFG: “nwscanmode”,0

LTE:
[10:15:34.613]收←◆AT+QCFG=“nwscanmode”
+QCFG: “nwscanmode”,3
[10:15:16.814]收←◆AT+QNWINFO
+QNWINFO: “NBIoT”,“46000”,“LTE BAND 8”,3684
[10:15:19.064]收←◆AT+QENG=“SERVINGCELL”
+QENG: “servingcell”,“LIMSRV”,“NBIoT”,“FDD”,
[10:15:41.606]收←◆AT+QENG=“SERVINGCELL”
+QENG: “servingcell”,“SEARCH”
[10:17:21.771]发→◇AT+QPING=1,“8.8.8.8”,60,1
[10:17:21.776]收←◆AT+QPING=1,“8.8.8.8”,60,1
OK
+QPING: 561

2

Hi @JasonHe

As AT command shows, thats you got limited service on NBIOT B8, Could you please check the SIM if support to register LTE? or if there any special APN for register to LTE?

+QENG: “servingcell”,“LIMSRV”,“NBIoT”,“FDD”,

3

@Linkin-Q
Thanks for your great support.
I will check with carrier of SIM card for LTE support.
And I do not set special APN for LTE, you can see below log information:
[10:10:16.839]收←◆AT+CGDCONT?
+CGDCONT: 1,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0

In addition, could you please help to check if the PING log is normal or not? It returns “+QPING: 561”. What does “+QPING: 561” mean?
[10:17:21.771]发→◇AT+QPING=1,“8.8.8.8”,60,1
[10:17:21.776]收←◆AT+QPING=1,“8.8.8.8”,60,1
OK
+QPING: 561

4

Hi,
image

It’s hard to say what’s the root cuuse without modem log. but please check which operator SIM using now & check at+QMBNCFG=“list” command response.