Issue Connecting to Network

[Paul Harvey]

Hi all,

I am relatively new to this, so please excuse silly mistakes.

I have a PCEngines APU2, and a EC21-J LTE modem and a sim card. I am trying
to connect to the network. In case it is relevant, i'm in Japan.

The following explains in more details, but bascically i am not able to
connect to the network. I don't know why, and i don't know how to go about
debugging. Any and all help appreciated. I removed the phone numbers and
passwords...


I can see the modem and the sim card is being read:

$ sudo mmcli -m 1


  --------------------------------
  General  |            dbus path: /org/freedesktop/ModemManager1/Modem/1
           |            device id: b0f974be664b5de29807bacd72562cec57bc102a
  --------------------------------
  Hardware |         manufacturer: QUALCOMM INCORPORATED
           |                model: QUECTEL Mobile Broadband Module
           |             revision: EC21JFAR06A02M4G
           |         h/w revision: 10000
           |            supported: lte
           |              current: lte
           |         equipment id: 866522040026011
  --------------------------------
  System   |               device:
/sys/devices/pci0000:00/0000:00:13.0/usb1/1-1/1-1.3
           |              drivers: option1, qmi_wwan
           |               plugin: Quectel
           |         primary port: cdc-wdm0
           |                ports: ttyUSB0 (qcdm), ttyUSB2 (at), cdc-wdm0
(qmi),
           |                       wwp0s19u1u3i4 (net), ttyUSB3 (at)
  --------------------------------
  Numbers  |                  own: ************
  --------------------------------
  Status   |                 lock: sim-pin2
           |       unlock retries: sim-pin (3), sim-pin2 (3), sim-puk (10),
sim-puk2 (10)
           |                state: enabled
           |          power state: on
           |       signal quality: 0% (cached)
  --------------------------------
  Modes    |            supported: allowed: 4g; preferred: none
           |              current: allowed: 4g; preferred: none
  --------------------------------
  Bands    |            supported: eutran-1, eutran-3, eutran-8, eutran-18,
eutran-19
           |              current: eutran-1, eutran-3, eutran-8, eutran-18,
eutran-19
  --------------------------------
  IP       |            supported: ipv4, ipv6, ipv4v6
  --------------------------------
  3GPP     |                 imei: 866522040026011
  --------------------------------
  3GPP EPS | ue mode of operation: csps-2
  --------------------------------
  SIM      |            dbus path: /org/freedesktop/ModemManager1/SIM/1


Also, i can scan for networks

# qmicli --device  /dev/cdc-wdm0 --nas-network-scan
[/dev/cdc-wdm0] Successfully scanned networks
Network [0]:
        MCC: '440'
        MNC: '10'
        Status: 'available, home, not-forbidden, preferred'
        Description: 'DOCOMO'
Network [1]:
        MCC: '440'
        MNC: '52'
        Status: 'available, roaming, forbidden, not-preferred'
        Description: '440 52'
Network [2]:
        MCC: '440'
        MNC: '50'
        Status: 'available, roaming, forbidden, not-preferred'
        Description: 'KDDI'
Network [3]:
        MCC: '440'
        MNC: '51'
        Status: 'available, roaming, forbidden, not-preferred'
        Description: 'KDDI'
Network [4]:
        MCC: '440'
        MNC: '20'
        Status: 'current-serving, roaming, forbidden, not-preferred'
        Description: 'SoftBank'
Network [0]:
        MCC: '440'
        MNC: '10'
        RAT: 'lte'
Network [1]:
        MCC: '440'
        MNC: '52'
        RAT: 'lte'
Network [2]:
        MCC: '440'
        MNC: '50'
        RAT: 'lte'
Network [3]:
        MCC: '440'
        MNC: '51'
        RAT: 'lte'
Network [4]:
        MCC: '440'
        MNC: '20'
        RAT: 'lte'
Network [0]:
        MCC: '440'
        MNC: '10'
        MCC with PCS digit: 'no'
Network [1]:
        MCC: '440'
        MNC: '52'
        MCC with PCS digit: 'no'
Network [2]:
        MCC: '440'
        MNC: '50'
        MCC with PCS digit: 'no'
Network [3]:
        MCC: '440'
        MNC: '51'
        MCC with PCS digit: 'no'
Network [4]:
        MCC: '440'
        MNC: '20'
        MCC with PCS digit: 'no'

When i try to connect i get the following:

# qmi-network /dev/cdc-wdm0 start
Loading profile at /etc/qmi-network.conf...
    APN: ****
    APN user: ****
    APN password: ****
    qmi-proxy: no
Checking data format with 'qmicli -d /dev/cdc-wdm0 --wda-get-data-format
'...
Device link layer protocol retrieved: raw-ip
Getting expected data format with 'qmicli -d /dev/cdc-wdm0
--get-expected-data-format'...
Expected link layer protocol retrieved: raw-ip
Device and kernel link layer protocol match: raw-ip
Starting network with 'qmicli -d /dev/cdc-wdm0
--wds-start-network=apn='***'  --client-no-release-cid '...
error: couldn't start network: QMI protocol error (14): 'CallFailed'
call end reason (3): generic-no-service
verbose call end reason (3,2001): [cm] no-service
Saving state at /tmp/qmi-network-state-cdc-wdm0... (CID: 20)
error: network start failed, no packet data handle
Clearing state at /tmp/qmi-network-state-cdc-wdm0...
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