Cannot get connection with LE910C4-NF

[Fernando B]

Good day,

Looking for some guidance on how to troubleshoot this, I have a Debian 11
with LE910C4-NF which we use with two hardware sim slots, so the active
slot is always on slot 1 as far as mmcli is concerned. This vendor provides
a cli to switch slots. I can switch to slot 2 for verizon and make a
connection just fine with modemmanager. However on slot 1 with att, it just
timeout. Even if I do verbose there isn't much information to go on. The
strength shows 75%.

I have an enterprise booster antenna, so I should be able to connect. On
Debian 9 with a Sierra modem with qmi I can connect with att with
sudo mmcli -m 0 --simple-connect='apn=our.custom.apn,ip-type=ipv4v6'

moxa at hostname:~$ mmcli -m 10
  ----------------------------------
  General  |                   path: /org/freedesktop/ModemManager1/Modem/10
           |              device id:
a411abc5574ab456d4cd12c8decfcb87819a4b37
  ----------------------------------
  Hardware |           manufacturer: Telit
           |                  model: LE910C4-NF
           |      firmware revision: 25.20.668  1  [Mar 20 2020 12:00:00]
           |         carrier config: default
           |           h/w revision: 1.10
           |              supported: gsm-umts, lte
           |                current: gsm-umts, lte
           |           equipment id: 350344982749853
  ----------------------------------
  System   |                 device:
/sys/devices/platform/soc/30800000.bus/30b10000.usb/ci_hdrc.0/usb1/1-1
           |                drivers: qmi_wwan, option
           |                 plugin: Moxa-Telit-LE910CX
           |           primary port: cdc-wdm0
           |                  ports: cdc-wdm0 (qmi), ttyUSB4 (ignored),
ttyUSB5 (gps),
           |                         ttyUSB6 (at), ttyUSB7 (at), ttyUSB8
(ignored), wwan0 (net)
  ----------------------------------
  Status   |                   lock: sim-pin2
           |         unlock retries: sim-pin (3), sim-puk (10), sim-pin2
(3), sim-puk2 (10)
           |                  state: enabled
           |            power state: on
           |            access tech: lte
           |         signal quality: 100% (cached)
  ----------------------------------
  Modes    |              supported: allowed: 3g; preferred: none
           |                         allowed: 4g; preferred: none
           |                         allowed: 3g, 4g; preferred: 4g
           |                         allowed: 3g, 4g; preferred: 3g
           |                current: allowed: 2g, 3g, 4g; preferred: 4g
  ----------------------------------
  Bands    |              supported: utran-4, utran-5, utran-2, eutran-2,
eutran-4, eutran-5,
           |                         eutran-12, eutran-13, eutran-14,
eutran-66, eutran-71
           |                current: utran-4, utran-5, utran-2, eutran-2,
eutran-4, eutran-5,
           |                         eutran-12, eutran-13, eutran-14,
eutran-66, eutran-71
  ----------------------------------
  IP       |              supported: ipv4, ipv6, ipv4v6
  ----------------------------------
  3GPP     |                   imei: 350344982749853
           |          enabled locks: fixed-dialing
           |            operator id: 310260
           |           registration: idle
  ----------------------------------
  3GPP EPS |   ue mode of operation: csps-2
           |     initial bearer apn: nxtgenphone
           | initial bearer ip type: ipv4v6
  ----------------------------------
  SIM      |       primary sim path: /org/freedesktop/ModemManager1/SIM/8
           |         sim slot paths: slot 1:
/org/freedesktop/ModemManager1/SIM/8 (active)
           |                         slot 2: none

moxa at moxa-tbbbb1182802:~$ sudo mmcli -m 10 --3gpp-scan --timeout=300
[sudo] password for moxa:
  ---------------------
  3GPP scan | networks: 311490 - 311 490 (lte, forbidden)
            |           313100 - 313 100 (lte, available)
            |           310260 - AT&T (lte, current)
            |           311480 - Verizon (lte, forbidden)
            |           310410 - AT&T (lte, available)

Thank you,
Fernando B.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/modemmanager-devel/attachments/20231019/b8f49c18/attachment.htm>