BG95M3 Connection Issues

IoT Modules LPWA Module
1

I have a BG95 module that is having problems connecting to the cell network (ATT).
We have moved the SIM card to another modem and it works fine.
The return from CREG? changes between 3 (Registration denied) and 2 (trying to attach or searching).
I thought about the antenna but it seems to be getting signal, when no antenna is attached we just get NO SERVICE.

Any thoughts on what I can try next?

Here are some diagnostic commands I have run trying to figure out what is going on:

AT+CFUN?
+CFUN: 1
OK

AT+CREG?;+CEREG?;+CGREG?
+CREG: 0,3
+CEREG: 0,3
+CGREG: 0,4
OK

ATI9
Quectel
BG95-M3
Revision: BG95M3LAR02A03
OK

AT+COPS?
+COPS: 0
OK

AT+COPS=?
+COPS: (1,“313 100”,“313 100”,“313100”,8),(1,“311 589”,“311 589”,“311589”,8),(1,“311 588”,“311 588”,“311588”,9),(1,“311 588”,“311 588”,“311588”,8),(1,“AT&T”,“AT&T”,“310410”,8),(1,“AT&T”,“AT&T”,“310410”,9),(1,“U.S.Cellular”,“USCC”,“311580”,8),(0,1,2,3,4),(0,1,2)
OK

AT+QCSQ
+QCSQ: “eMTC”,0,-140,8,-3
OK

AT+CSQ
+CSQ: 31,99
OK

AT+QNWINFO
+QNWINFO: “eMTC”,“310410”,“LTE BAND 2”,825
OK

AT+WS46?
30
OK

2

I am having the exact same issue with BG95M3LAR02A03 and an AT&T SIM.

3

Yes, Even I have the same problem with the BG95-M3 module. It seems the sim registration is failed.

4

I having the same issue. Is there any solution for that?

5

Hello All,

Its very hard to find root cause according those AT commands, Could you please help collect
modem log then we can find final reason.
Here is a manual for collecting modem log on BG95(chapter 3.1.1)
https://cnquectel-my.sharepoint.com/:b:/g/personal/linkin_wang_quectel_com/ETePiw2WP5NKmMfhw9QmOJ8B5fc9bAEf9WGEZu0RRYSQHg?e=3IKMCR

6

QWINLOG Tool
https://cnquectel-my.sharepoint.com/:u:/g/personal/linkin_wang_quectel_com/EWY0vTpYowJHjMS25UfpleABdOx1cbli9_nWLMjAnDbNbg?e=D1o0x0