Bug 205807 - Softbank 403ZT (ZTE) modem support
Summary: Softbank 403ZT (ZTE) modem support
Status: NEW
Alias: None
Product: Drivers
Classification: Unclassified
Component: USB (show other bugs)
Hardware: x86-64 Linux
: P1 normal
Assignee: drivers_network-wireless@kernel-bugs.osdl.org
URL: http://www.draisberghof.de/usb_modesw...
Keywords:
Depends on:
Blocks:
 
Reported: 2019-12-09 05:03 UTC by ___
Modified: 2020-07-11 19:03 UTC (History)
2 users (show)

See Also:
Kernel Version: 5.4.2
Tree: Mainline
Regression: No


Attachments

Description ___ 2019-12-09 05:03:47 UTC
I am using a ZTE LTE modem, at it has been good so far, with Network Manager discovering a connection and allowing to connect with a menu.

Since updating to 5.4 this "almost" doesn't work. I am writing "almost" because sometimes, for unknown reason, the modem is correctly recognized. What makes the difference, I don't understand.

In case of an "incorrectly regognized modem", dmesg looks like this:

[Dec 9 10:08] usb 2-1.4: new high-speed USB device number 24 using ehci-pci
[  +0.080775] usb 2-1.4: New USB device found, idVendor=19d2, idProduct=1421, bcdDevice=50.02
[  +0.000003] usb 2-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  +0.000003] usb 2-1.4: Product: ZTE Technologies MSM
[  +0.000002] usb 2-1.4: Manufacturer: ZTE,Incorporated
[  +0.000001] usb 2-1.4: SerialNumber: MF860EZTED000000CP261718YDT0RQ5OM9E1KX8_8_6D75&&&&&&&&&&&&&&&&&0
[  +0.000819] usb-storage 2-1.4:1.0: USB Mass Storage device detected
[  +0.000232] scsi host6: usb-storage 2-1.4:1.0
[  +5.634188] usb 2-1.4: USB disconnect, device number 24
[  +0.428194] usb 2-1.4: new high-speed USB device number 25 using ehci-pci
[  +0.102091] usb 2-1.4: New USB device found, idVendor=19d2, idProduct=1282, bcdDevice=50.02
[  +0.000004] usb 2-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  +0.000002] usb 2-1.4: Product: ZTE Technologies MSM
[  +0.000002] usb 2-1.4: Manufacturer: ZTE,Incorporated
[  +0.000001] usb 2-1.4: SerialNumber: MF860EZTED000000CP261718YDT0RQ5OM9E1KX8_8_6D75&&&&&&&&&&&&&&&&&0
[  +0.023738] option 2-1.4:1.0: GSM modem (1-port) converter detected
[  +0.000112] usb 2-1.4: GSM modem (1-port) converter now attached to ttyUSB0
[  +0.000231] option 2-1.4:1.3: GSM modem (1-port) converter detected
[  +0.000063] usb 2-1.4: GSM modem (1-port) converter now attached to ttyUSB1
[  +0.000321] usb-storage 2-1.4:1.4: USB Mass Storage device detected
[  +0.000119] scsi host6: usb-storage 2-1.4:1.4
[  +1.014194] scsi 6:0:0:0: CD-ROM            CWID     USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
[  +0.003464] sr 6:0:0:0: [sr0] scsi-1 drive
[  +0.015140] sr 6:0:0:0: Attached scsi CD-ROM sr0

Note the two ttyUSBn 

In case of a "correctly recognized" modem, which sometimes happens with a kernel 5.4.2 (but seldom), dmesg looks like this:

[  +0.040008] usb 2-1.4: new high-speed USB device number 3 using ehci-pci
[  +0.045718] usb 1-1.4: config 1 interface 1 altsetting 0 endpoint 0x83 has wMaxPacketSize 0, skipping
[  +0.004096] usb 1-1.4: config 1 interface 1 altsetting 0 endpoint 0x3 has wMaxPacketSize 0, skipping
[  +0.005911] usb 1-1.4: New USB device found, idVendor=413c, idProduct=8187, bcdDevice= 5.17
[  +0.000856] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  +0.000811] usb 1-1.4: Product: DW375 Bluetooth Module
[  +0.000818] usb 1-1.4: Manufacturer: Dell Computer Corp
[  +0.000825] usb 1-1.4: SerialNumber: D0DF9A3F37CA
[  +0.031316] usb 2-1.4: New USB device found, idVendor=19d2, idProduct=1421, bcdDevice=50.02
[  +0.002266] usb 2-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  +0.002272] usb 2-1.4: Product: ZTE Technologies MSM
[  +0.002147] usb 2-1.4: Manufacturer: ZTE,Incorporated
[  +0.002111] usb 2-1.4: SerialNumber: MF860EZTED000000CP261718YDT0RQ5OM9E1KX8_8_6D75&&&&&&&&&&&&&&&&&0
[  +0.025812] usb 1-1.5: new high-speed USB device number 4 using ehci-pci
[  +0.044029] usb 2-1.8: new full-speed USB device number 4 using ehci-pci
[  +0.044369] usb 1-1.5: New USB device found, idVendor=05ca, idProduct=181c, bcdDevice=12.28
[  +0.002114] usb 1-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[  +0.002010] usb 1-1.5: Product: Laptop_Integrated_Webcam_FHD
[  +0.002107] usb 1-1.5: Manufacturer: CN0CJ3P27248716K0BEFA01
[  +0.055469] usb 2-1.8: New USB device found, idVendor=0a5c, idProduct=5800, bcdDevice= 1.01
[  +0.002238] usb 2-1.8: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  +0.002025] usb 2-1.8: Product: 5880
[  +0.001982] usb 2-1.8: Manufacturer: Broadcom Corp
[  +0.001967] usb 2-1.8: SerialNumber: 0123456789ABCD
[  +0.002393] usb 2-1.8: config 0 descriptor??
[  +0.047939] Bluetooth: Core ver 2.22
[  +0.001183] NET: Registered protocol family 31
[  +0.001189] Bluetooth: HCI device and connection manager initialized
[  +0.001139] mc: Linux media interface: v0.10
[  +0.000559] Bluetooth: HCI socket layer initialized
[  +0.001565] Bluetooth: L2CAP socket layer initialized
[  +0.001328] Bluetooth: SCO socket layer initialized
[  +0.007940] videodev: Linux video capture interface: v2.00
[  +0.000054] usb-storage 2-1.4:1.0: USB Mass Storage device detected
[  +0.002385] scsi host6: usb-storage 2-1.4:1.0
[  +0.001085] usbcore: registered new interface driver usb-storage
[  +0.002791] usbcore: registered new interface driver btusb
[  +0.001154] usbcore: registered new interface driver uas
[  +0.012525] uvcvideo: Found UVC 1.00 device Laptop_Integrated_Webcam_FHD (05ca:181c)
[  +0.006918] uvcvideo 1-1.5:1.0: Entity type for entity Extension 4 was not initialized!
[  +0.000553] uvcvideo 1-1.5:1.0: Entity type for entity Extension 3 was not initialized!
[  +0.000529] uvcvideo 1-1.5:1.0: Entity type for entity Processing 2 was not initialized!
[  +0.000531] uvcvideo 1-1.5:1.0: Entity type for entity Camera 1 was not initialized!
[  +0.000943] input: Laptop_Integrated_Webcam_FHD: I as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.5/1-1.5:1.0/input/input17
[  +0.001769] usbcore: registered new interface driver uvcvideo
[  +0.000996] USB Video Class driver (1.1.1)
[  +0.314575] input: AlpsPS/2 ALPS DualPoint Stick as /devices/platform/i8042/serio1/input/input18
[  +0.015415] input: AlpsPS/2 ALPS DualPoint TouchPad as /devices/platform/i8042/serio1/input/input8
[  +0.172160] random: crng init done
[  +0.000574] random: 7 urandom warning(s) missed due to ratelimiting
[  +0.539974] scsi 6:0:0:0: CD-ROM            CWID     USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
[  +0.052056] sr 6:0:0:0: Power-on or device reset occurred
[  +0.079505] sr 6:0:0:0: [sr0] scsi-1 drive
[  +0.001698] cdrom: Uniform CD-ROM driver Revision: 3.20
[  +0.015925] sr 6:0:0:0: Attached scsi CD-ROM sr0
[  +2.685005] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts: (null)
[  +0.005800] FAT-fs (sda1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[  +2.386508] usb 2-1.4: USB disconnect, device number 3
[  +0.277065] usb 2-1.4: new high-speed USB device number 5 using ehci-pci
[  +0.112852] usb 2-1.4: New USB device found, idVendor=19d2, idProduct=0017, bcdDevice=50.02
[  +0.001850] usb 2-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  +0.001792] usb 2-1.4: Product: ZTE Technologies MSM
[  +0.001219] usb 2-1.4: Manufacturer: ZTE,Incorporated
[  +0.001153] usb 2-1.4: SerialNumber: MF860EZTED000000CP261718YDT0RQ5OM9E1KX8_8_6D75&&&&&&&&&&&&&&&&&0
[  +0.028146] usb-storage 2-1.4:1.4: USB Mass Storage device detected
[  +0.002444] scsi host6: usb-storage 2-1.4:1.4
[  +0.067556] usbcore: registered new interface driver usbserial_generic
[  +0.000900] usbserial: USB Serial support registered for generic
[  +0.001407] usbcore: registered new interface driver cdc_wdm
[  +0.001350] usbcore: registered new interface driver option
[  +0.000685] usbserial: USB Serial support registered for GSM modem (1-port)
[  +0.000599] qmi_wwan 2-1.4:1.3: cdc-wdm0: USB WDM device
[  +0.012520] qmi_wwan 2-1.4:1.3 wwan0: register 'qmi_wwan' at usb-0000:00:1d.0-1.4, WWAN/QMI device, b6:cb:c1:26:49:d6
[  +0.002047] usbcore: registered new interface driver qmi_wwan
[  +0.000069] option 2-1.4:1.0: GSM modem (1-port) converter detected
[  +0.003594] usb 2-1.4: GSM modem (1-port) converter now attached to ttyUSB0
[  +0.946362] scsi 6:0:0:0: CD-ROM            CWID     USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
[  +0.004561] sr 6:0:0:0: [sr0] scsi-1 drive
[  +0.014453] sr 6:0:0:0: Attached scsi CD-ROM sr0

Please excuse the interspersion of dmesg with other devices. This time the "correct initialization" happened during boot time. Note the cdc_wdm driver appearing in the log, which doesn't happen in case of an incorrect initialization. 

Not every reboot with a plugged-in modem ends up in a correct initialization. Perhaps there is some race-condition?

Bugzilla-recommended form:

Steps to Reproduce: Insert the modem and wait for the new connection to appear in the Network Manager.

Actual Results: Nothing happens, some confusing information in dmesg.

Expected Results: A connection appearing and working.

Build Date & Hardware: Dell E6420, Slackware64-current, kernel 5.4.2, NetworkManager 1.20.8, ZTE Modem, 

root@delllaptop:~# lsusb
Bus 002 Device 003: ID 0a5c:5800 Broadcom Corp. BCM5880 Secure Applications Processor
Bus 002 Device 025: ID 19d2:1282 ZTE WCDMA Technologies MSM 
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 006: ID 05ca:181c Ricoh Co., Ltd 
Bus 001 Device 016: ID 413c:8187 Dell Computer Corp. DW375 Bluetooth Module
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

root@delllaptop:~# lsusb -D /dev/bus/usb/002/025 
Device: ID 19d2:1282 ZTE WCDMA Technologies MSM 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.10
  bDeviceClass            0 
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x19d2 ZTE WCDMA Technologies MSM
  idProduct          0x1282 
  bcdDevice           50.02
  iManufacturer           1 ZTE,Incorporated
  iProduct                2 ZTE Technologies MSM
  iSerial                 3 MF860EZTED000000CP261718YDT0RQ5OM9E1KX8_8_6D75&&&&&&&&&&&&&&&&&0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x00b7
    bNumInterfaces          5
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      0 
      bInterfaceProtocol      0 
      iInterface              0 
      ** UNRECOGNIZED:  05 24 00 10 01
      ** UNRECOGNIZED:  05 24 01 00 00
      ** UNRECOGNIZED:  04 24 02 02
      ** UNRECOGNIZED:  05 24 06 00 00
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x000a  1x 10 bytes
        bInterval               9
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      0 
      bInterfaceProtocol      0 
      iInterface              0 
      ** UNRECOGNIZED:  05 24 00 10 01
      ** UNRECOGNIZED:  05 24 01 00 00
      ** UNRECOGNIZED:  04 24 02 02
      ** UNRECOGNIZED:  05 24 06 00 00
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x85  EP 5 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x000a  1x 10 bytes
        bInterval               9
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x87  EP 7 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval               9
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x86  EP 6 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        4
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk-Only
      iInterface              4 Mass Storage
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x88  EP 8 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x05  EP 5 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1
Binary Object Store Descriptor:
  bLength                 5
  bDescriptorType        15
  wTotalLength       0x0016
  bNumDeviceCaps          2
  USB 2.0 Extension Device Capability:
    bLength                 7
    bDescriptorType        16
    bDevCapabilityType      2
    bmAttributes   0x00000002
      HIRD Link Power Management (LPM) Supported
  SuperSpeed USB Device Capability:
    bLength                10
    bDescriptorType        16
    bDevCapabilityType      3
    bmAttributes         0x00
    wSpeedsSupported   0x000f
      Device can operate at Low Speed (1Mbps)
      Device can operate at Full Speed (12Mbps)
      Device can operate at High Speed (480Mbps)
      Device can operate at SuperSpeed (5Gbps)
    bFunctionalitySupport   1
      Lowest fully-functional device speed is Full Speed (12Mbps)
    bU1DevExitLat           1 micro seconds
    bU2DevExitLat         500 micro seconds
can't get debug descriptor: Resource temporarily unavailable
Device Status:     0x0000
  (Bus Powered)



Additional Information:

I never needed usb_modeswitch with this modem.
Comment 1 ___ 2019-12-15 14:12:10 UTC
After trying for some more time, I still have this bug.

The modem is detected correctly with probability of about 50% if inserted before booting the system.

It is always detected incorrectly if inserted into a running system.

All debugging suggestions welcome.
Comment 2 ___ 2019-12-18 05:12:45 UTC
After consulting the author of usb_modeswitch, he suggested that either option.ko, or qmi_wwan.ko can to be updated with the support for this modem if working as a usb_id 19d2:1282
Comment 3 Lars Melin 2019-12-18 06:36:31 UTC
The device in question is a Softbank 435ZT branded ZTE modem which if not manually mode switched will automatically switch to 19d2:0017 which is a ZTE debug & firmware download id.
The user has in the past relied on this automatic mode switch but the device is now included for switching in the latest usb_modeswitch where it gets switched to 19d2:1282, an id which has been confirmed to be correct by checking the Windows drivers from Softbank.

19d2:1282 was included in linux option driver in commit a71ee85e1d74e862d68cc9b2f2ab6a806d2550c9 from 2010-07-05, a commit which adds a whole bunch of id's which ZTE anticipated that they would use in the future. 
Unfortunately most (all?) of them are incorrect and many of them has been corrected over the years - none of them initially excluded the net interface and all of them have the class/subclass/proto attributes of ff/ff/ff which is wrong for many of them.

19d2:1282 has the following interface layout according to Win drivers and attributes according to users verbose lsusb listing:

MI_00 ZTE Diagnostics Device  (ff/ff/ff)
MI_01 ZTE UI AT Interface  (ff/00/00)
MI_02 ZTE Proprietary USB Modem  (ff/00/00)
MI_03 ZTE Wireless Ethernet Adapter  (ff/ff/ff , qmi_wwan)  
MI_04 USB Mass Storage Device   (08/06/50)

The option driver needs to be corrected so it only supports interface 1 and 2.
The net interface should then be added into the qmi_wwan driver.
Comment 4 Lars Melin 2019-12-18 10:12:15 UTC
Softbank 403ZT it is, not 435ZT.
Comment 5 Sagi 2020-07-11 19:03:45 UTC
I have tested the following patch on Linux kernel version 4.14.180 (OpenWRT 19.07.3 on ARMv7 architecture)

diff --git a/qmi_wwan.c b/qmi_wwan.c
--- a/qmi_wwan.c
+++ b/qmi_wwan.c
@@ -1279,6 +1279,7 @@ static const struct usb_device_id products[] = {
 	{QMI_FIXED_INTF(0x19d2, 0x1255, 4)},
 	{QMI_FIXED_INTF(0x19d2, 0x1256, 4)},
 	{QMI_FIXED_INTF(0x19d2, 0x1270, 5)},	/* ZTE MF667 */
+	{QMI_FIXED_INTF(0x19d2, 0x1282, 3)},	/* ZTE MF833V */
 	{QMI_FIXED_INTF(0x19d2, 0x1401, 2)},
 	{QMI_FIXED_INTF(0x19d2, 0x1402, 2)},	/* ZTE MF60 */
 	{QMI_FIXED_INTF(0x19d2, 0x1424, 2)},
-- 
2.17.1

It worked flawless and now I'm able to use the cdc-wdm interface with ease in OpenWRT qmi wrapper and uqmi binary

Logs from the router:
dmesg:
[   20.071280] usb 2-1: new high-speed USB device number 3 using xhci-hcd           [   20.265565] option 2-1:1.0: GSM modem (1-port) converter detected                [   20.271803] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB0        [   20.278873] option 2-1:1.1: GSM modem (1-port) converter detected                [   20.285147] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB1        [   20.292260] option 2-1:1.2: GSM modem (1-port) converter detected                [   20.293785] ieee80211 phy1: change: 0x100                                        [   20.298518] usb 2-1: GSM modem (1-port) converter now attached to ttyUSB2        [   20.309955] qmi_wwan 2-1:1.3: cdc-wdm0: USB WDM device    

lsusb:
Bus 002 Device 003: ID 19d2:1282 ZTE WCDMA Technologies MSM                       

uqmi -d /dev/cdc-wdm0 --get-capabilities
{
        "max_tx_channel_rate": 50000000,
        "max_rx_channel_rate": 100000000,
        "data_service": "non_simultaneous_cs_ps",
        "sim": "supported",
        "networks": [
                "gsm",
                "umts",
                "lte"
        ]
}

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