This is one USB modem in the standard offer of Vodafone Romania, as of August 2014.

sudo lsusb

Bus 003 Device 005: ID 19d2:1024 ZTE WCDMA Technologies MSM

sudo lsusb -v

Bus 003 Device 005: ID 19d2:1024 ZTE WCDMA Technologies MSM 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            2 Communications
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x19d2 ZTE WCDMA Technologies MSM
  idProduct          0x1024 
  bcdDevice           f0.55
  iManufacturer           4 Vodafone (ZTE)
  iProduct                3 ZTE WCDMA Technologies MSM
  iSerial                 5 P680A1ZTED010000
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          103
    bNumInterfaces          3
    bConfigurationValue     1
    iConfiguration          2 ZTE Configuration
    bmAttributes         0xc0
      Self Powered
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         2 Communications
      bInterfaceSubClass      6 Ethernet Networking
      bInterfaceProtocol      0 
      iInterface              0 
      CDC Header:
        bcdCDC               1.10
      CDC Ethernet:
        iMacAddress                      1 00A0C6000000
        bmEthernetStatistics    0x00000000
        wMaxSegmentSize               8192
        wNumberMCFilters            0x0001
        bNumberPowerFilters              0
      CDC Union:
        bMasterInterface        0
        bSlaveInterface         1 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               5
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 
      iInterface              0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           2
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 
      iInterface              0 
      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              32
      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              32
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk-Only
      iInterface              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
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            2 Communications
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0000
  (Bus Powered)

sudo dmesg

[  237.971599] usb 3-5: USB disconnect, device number 3
[  237.971687] cdc_ether 3-5:1.0: eth2: unregister 'cdc_ether' usb-0000:00:14.0-5, CDC Ethernet Device
[  372.071576] usb 3-5: new high-speed USB device number 4 using xhci_hcd
[  372.090810] usb 3-5: unable to read config index 2 descriptor/start: -32
[  372.090818] usb 3-5: chopping to 2 config(s)
[  372.092441] usb 3-5: ep 0x1 - rounding interval to 32768 microframes, ep desc says 0 microframes
[  372.092450] usb 3-5: ep 0x81 - rounding interval to 32768 microframes, ep desc says 0 microframes
[  372.095842] scsi8 : usb-storage 3-5:1.0
[  373.094356] usb 3-5: USB disconnect, device number 4
[  373.459070] usb 3-5: new high-speed USB device number 5 using xhci_hcd
[  373.478454] usb 3-5: ep 0x2 - rounding interval to 32768 microframes, ep desc says 0 microframes
[  373.478463] usb 3-5: ep 0x83 - rounding interval to 32768 microframes, ep desc says 0 microframes
[  373.483326] cdc_ether 3-5:1.0: eth2: register 'cdc_ether' at usb-0000:00:14.0-5, CDC Ethernet Device, 00:a0:c6:00:00:00
[  373.484174] scsi9 : usb-storage 3-5:1.2
[  374.484198] scsi 9:0:0:0: CD-ROM            Vodafone USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
[  374.488256] sr1: scsi-1 drive
[  374.488962] sr 9:0:0:0: Attached scsi CD-ROM sr1
[  374.489113] sr 9:0:0:0: Attached scsi generic sg2 type 5
[  374.548757] sr 9:0:0:0: ioctl_internal_command return code = 8070000
[  374.548764]    : Sense Key : Hardware Error [current] 
[  374.548770]    : Add. Sense: No additional sense information
[  374.883533] sr 9:0:0:0: ioctl_internal_command return code = 8070000
[  374.883535]    : Sense Key : Hardware Error [current] 
[  374.883537]    : Add. Sense: No additional sense information
[  384.011202] eth2: no IPv6 routers present
[  554.908691] usb 3-5: USB disconnect, device number 5
[  554.908784] cdc_ether 3-5:1.0: eth2: unregister 'cdc_ether' usb-0000:00:14.0-5, CDC Ethernet Device
[  560.626547] usb 3-5: new high-speed USB device number 6 using xhci_hcd
[  560.645417] usb 3-5: unable to read config index 2 descriptor/start: -32
[  560.645419] usb 3-5: chopping to 2 config(s)
[  560.646741] usb 3-5: ep 0x1 - rounding interval to 32768 microframes, ep desc says 0 microframes
[  560.646743] usb 3-5: ep 0x81 - rounding interval to 32768 microframes, ep desc says 0 microframes
[  560.649059] scsi10 : usb-storage 3-5:1.0
[  561.647961] scsi 10:0:0:0: Direct-Access     ZTE      MMC Storage      2.31 PQ: 0 ANSI: 2
[  561.648536] scsi 10:0:0:1: Direct-Access     ZTE      MMC Storage      2.31 PQ: 0 ANSI: 2
[  561.650424] usb 3-5: USB disconnect, device number 6
[  561.651560] sd 10:0:0:0: [sdb] READ CAPACITY failed
[  561.651567] sd 10:0:0:0: [sdb]  Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[  561.651574] sd 10:0:0:0: [sdb] Sense not available.
[  561.651590] sd 10:0:0:0: [sdb] Write Protect is off
[  561.651595] sd 10:0:0:0: [sdb] Mode Sense: 00 00 00 00
[  561.651610] sd 10:0:0:0: [sdb] Asking for cache data failed
[  561.651615] sd 10:0:0:0: [sdb] Assuming drive cache: write through
[  561.651868] sd 10:0:0:0: [sdb] Attached SCSI removable disk
[  561.657894] sd 10:0:0:0: Attached scsi generic sg2 type 0
[  561.658291] sd 10:0:0:1: [sdc] READ CAPACITY failed
[  561.658297] sd 10:0:0:1: [sdc]  Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[  561.658303] sd 10:0:0:1: [sdc] Sense not available.
[  561.658319] sd 10:0:0:1: [sdc] Write Protect is off
[  561.658324] sd 10:0:0:1: [sdc] Mode Sense: 00 00 00 00
[  561.658341] sd 10:0:0:1: [sdc] Asking for cache data failed
[  561.658342] sd 10:0:0:1: [sdc] Assuming drive cache: write through
[  561.658416] sd 10:0:0:1: [sdc] Attached SCSI removable disk
[  561.658445] sd 10:0:0:1: Attached scsi generic sg3 type 0
[  561.994052] usb 3-5: new high-speed USB device number 7 using xhci_hcd
[  562.015224] usb 3-5: ep 0x2 - rounding interval to 32768 microframes, ep desc says 0 microframes
[  562.015233] usb 3-5: ep 0x83 - rounding interval to 32768 microframes, ep desc says 0 microframes
[  562.020087] cdc_ether 3-5:1.0: eth2: register 'cdc_ether' at usb-0000:00:14.0-5, CDC Ethernet Device, 00:a0:c6:00:00:00
[  562.020423] scsi11 : usb-storage 3-5:1.2
[  563.019106] scsi 11:0:0:0: CD-ROM            Vodafone USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
[  563.022764] sr1: scsi-1 drive
[  563.022994] sr 11:0:0:0: Attached scsi CD-ROM sr1
[  563.024326] sr 11:0:0:0: Attached scsi generic sg2 type 5
[  563.086666] sr 11:0:0:0: ioctl_internal_command return code = 8070000
[  563.086672]    : Sense Key : Hardware Error [current] 
[  563.086679]    : Add. Sense: No additional sense information
[  563.382698] sr 11:0:0:0: ioctl_internal_command return code = 8070000
[  563.382700]    : Sense Key : Hardware Error [current] 
[  563.382702]    : Add. Sense: No additional sense information
[  573.017508] eth2: no IPv6 routers present