What to do when a USB WWAN (UMTS) stick doesn't work? That is, network manager shown broadband as not enabled...

The kernel log looks good:

[ 3313.057520] usb 2-1: New USB device found, idVendor=0e8d, idProduct=00a5, bcdDevice= 3.00
[ 3313.057528] usb 2-1: New USB device strings: Mfr=9, Product=10, SerialNumber=0
[ 3313.057536] usb 2-1: Manufacturer: MediaTek Inc
[ 3313.085587] cdc_mbim 2-1:1.0: cdc-wdm0: USB WDM device
[ 3313.086142] cdc_mbim 2-1:1.0 wwan0: register 'cdc_mbim' at usb-0000:00:14.0-1, CDC MBIM, d2:9c:37:32:10:73
[ 3313.086885] option 2-1:1.2: GSM modem (1-port) converter detected
[ 3313.087140] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB0
[ 3313.087520] option 2-1:1.3: GSM modem (1-port) converter detected
[ 3313.087654] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB1
[ 3313.087924] option 2-1:1.4: GSM modem (1-port) converter detected
[ 3313.088050] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB2
[ 3313.088322] option 2-1:1.5: GSM modem (1-port) converter detected
[ 3313.090237] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB3
[ 3313.090693] usb-storage 2-1:1.6: USB Mass Storage device detected
[ 3313.143856] cdc_mbim 2-1:1.0 wwp0s20u1: renamed from wwan0
[ 3314.109400] scsi 3:0:0:0: Direct-Access     MEDIATEK  FLASH DISK      6225 PQ: 0 ANSI: 0 CCS
[ 3314.110360] sd 3:0:0:0: Attached scsi generic sg1 type 0
[ 3314.128902] sd 3:0:0:0: [sdb] 0 512-byte logical blocks: (0 B/0 B)
[ 3314.131013] sd 3:0:0:0: [sdb] Attached SCSI removable disk

The ModemManager has a useful command-line tool, mmcli, that can be used to show status of the modem. Try mmcli -v -m 6 where 6 is an index of the modem:

[20 Mai 2019, 18:56:55] [Debug] ModemManager process found at ':1.2'
[20 Mai 2019, 18:56:55] [Debug] Assuming '6' is the modem index
[20 Mai 2019, 18:56:55] [Debug] Modem found at '/org/freedesktop/ModemManager1/Modem/6'

[20 Mai 2019, 18:56:55] [Debug] Printing modem info...
  --------------------------
  General  |      dbus path: /org/freedesktop/ModemManager1/Modem/6
           |      device id: a67f08189ddc6295ad23160780ebeb06a0925a6c
  --------------------------
  Hardware |   manufacturer: MediaTek Inc
           |          model: Product
           |       revision: UW980_42M_ESMT_V101R01B08
           |   h/w revision: MTK2
           |      supported: gsm-umts
           |        current: gsm-umts
           |   equipment id: 355128006541593
  --------------------------
  System   |         device: /sys/devices/pci0000:00/0000:00:14.0/usb2/2-1
           |        drivers: cdc_mbim, option1
           |         plugin: Generic
           |   primary port: cdc-wdm0
           |          ports: ttyUSB0 (at), ttyUSB1 (at), cdc-wdm0 (mbim), wwp0s20u1 (net)
  --------------------------
  Status   |          state: failed
           |  failed reason: sim-missing
           |    power state: on
           | signal quality: 0% (cached)
  --------------------------
  Modes    |      supported: allowed: 2g, 3g; preferred: none
           |        current: allowed: any; preferred: none
  --------------------------
  IP       |      supported: ipv4, ipv6, ipv4v6

In this case, the SIM card seem to be missing (failed reason: sim-missing); or defective rather.

posted at: 21:26 | path: /configuration | permanent link