Unable to register network on BG95

IoT Modules LPWA Module
1

Hi,
we are using the BG95-M3 module (Revision: BG95M3LAR02A03). We have problem to obtain valid connection with BTS. “AT+COPS=0” has no results. After “AT+COPS=1,2,“26006”,0” and reboot, we obtain results below:

TX: AT+COPS?
RX: +COPS: 1,0,“Play”,0
RX: OK

TX: AT+QCSQ
RX: +QCSQ: “GSM”,-86
RX: OK

TX: AT+CGREG?
RX: +CGREG: 0,1
RX: OK

TX: AT+QNWINFO
RX: +QNWINFO: No Service
RX: OK

It’s is not possible to attach to network by command “AT+QIACT=1”(configuring PDP Context before), do calls by “ATDxxx;”, and send SMS. We had tested module on 2 different SIM card, and supplying module attaching 3,8 V(measured voltage ripple ~15 mV).

2

We tried to connect to another operator. The module get attached to network, but still don’t work.
The “AT+QNWINFO” results"

+QNWINFO: "eMTC","26003","LTE BAND 20",6200

The module got IP, AT+QIACT=1 and AT+QIACT? results:

+QIACT: 1,1,1,"100.124.79.92"

but module still can’t ping, QISEND, ATD etc.
When we try to connect in GSM mode by:

AT+COPS=1,2,"26006",0

module can’t still attach to PDP.
Any attempt to AT+COPS=? hangs module.

Reported signal parameter is:

+QCSQ: "eMTC",-64,-91,103,-15
3

I think the module has registered the network successfully, please upload the log of TCP/UDP connection operation,I will analyze it!

4

Should I use a special log retrieval program? I set debug option:

AT+QCFG="dbgctl",0

,but on DM port I can’t see any info.
The app version is: 01.014.01.014
At this moment, I can say only, that command:

AT+QPING=1,"216.239.32.10"

results:

OK
+QPING: 569
+QPING: 569
+QPING: 569
+QPING: 569
+QPING: 569

and:

TX: AT+QIOPEN=1,0,"TCP","216.239.32.10",80,0,0
RX: OK

TX: AT+QISTATE
RX: +QISTATE: 0,"TCP","216.239.32.10",80,0,1,1,0,0,"usbmodem"
RX: OK
#wait some seconds
RX: +QIOPEN: 0,550

Thank you for your time!

5

The problem was caused by the GPS module. If I turned it off and disabled GPS autostart, all UE functions became available.