Wwan0 RX and TX errors, unable to establish connection

Hi,

I’m using the LTE-M cellular kit with my RPI Zero: Raspberry Pi Cellular IoT Kit (LTE-M) - Sixfab

I’m using the included Sixfab SIM as well. I followed the setup guides for Sixfab Core.

I have verified signal using AT+CSQ, and registration to a regional carrier using AT+COPS?

When I try ifconfig wwan0, I get this as the output:

wwan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet <removed for privacy>  netmask 255.255.0.0  broadcast 169.254.255.255
        inet6 <removed for privacy>  prefixlen 64  scopeid 0x20<link>
        ether <removed for privacy>  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0 dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0 dropped 0 overruns 0  carrier 0  collisions 0

Sometimes, the RX and TX will show errors, like this:

wwan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet <removed for privacy>  netmask 255.255.0.0  broadcast 169.254.255.255
        inet6 <removed for privacy>  prefixlen 64  scopeid 0x20<link>
        ether <removed for privacy>  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 120 dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 43 dropped 0 overruns 0  carrier 0  collisions 0

I have not been able to get my device online through LTE, and hoping these might provide some clues. On the Connect dashboard it always just says “Cellular Connection Unavailable”.

Not really sure where to go on this… Would appreciate some help for some next steps to figuring this out. Thanks!

Edit: I forgot to mention that I have also updated the firmware of the modem to the latest version following Sixfab’s guide.

please share the following logs:

/home/sixfab/.core/logs/cm-log
/home/sixfab/.core/logs/agent-log
/home/sixfab/.core/monitor.yaml
/home/sixfab/.core/system.yaml

and the output of the following commands

sudo systemctl status core_manager.service
sudo systemctl status core_agent.service