[root@stlinux]#/etc/ppp/usb_modeswitch -W -c /etc/ppp/switch/12d1:155b

Reading config file: /etc/ppp/switch/12d1:155b

 * usb_modeswitch: handle USB devices with multiple modes
 * Version 1.2.4 (C) Josua Dietze 2012
 * Based on libusb0 (0.1.12 and above)

 ! PLEASE REPORT NEW CONFIGURATIONS !

DefaultVendor=  0x12d1
DefaultProduct= 0x155b
TargetVendor=   0x12d1
TargetProduct=  0x1506
TargetClass=    not set
TargetProductList=""

DetachStorageOnly=0
HuaweiMode=0
SierraMode=0
SonyMode=0
QisdaMode=0
GCTMode=0
KobilMode=0
SequansMode=0
MobileActionMode=0
CiscoMode=0
MessageEndpoint=  not set
MessageContent="55534243000000000000000000000011060000000100000000000000000000"
NeedResponse=0
ResponseEndpoint= not set

InquireDevice enabled (default)
Success check disabled
System integration mode disabled


usb_set_debug: Setting debugging level to 15 (on)
usb_os_find_busses: Found 002
usb_os_find_busses: Found 001
usb_os_find_busses: Skipping non bus directory devices
usb_os_find_devices: Found 001 on 002
usb_os_find_devices: Found 002 on 001
usb_os_find_devices: Found 001 on 001
error obtaining child information: Inappropriate ioctl for device
Looking for target devices ...
  searching devices, found USB ID 1d6b:0001
  searching devices, found USB ID 12d1:155b
   found matching vendor ID
  searching devices, found USB ID 1d6b:0002
 No devices in target mode or class found
Looking for default devices ...
  searching devices, found USB ID 1d6b:0001
  searching devices, found USB ID 12d1:155b
   found matching vendor ID
   found matching product ID
   adding device
  searching devices, found USB ID 1d6b:0002
 Found device in default mode, class or configuration (1)
Accessing device 002 on bus 001 ...
Getting the current device configuration ...
 OK, got current device configuration (1)
Using interface number 0
Using endpoints 0x01 (out) and 0x81 (in)
Inquiring device details; driver will be detached ...
Looking for active driver ...
 OK, driver found ("usb-storage")
 OK, driver "usb-storage" detached

SCSI inquiry data (for identification)
-------------------------
  Vendor String:
   Model String: Mass Storage
Revision String: 2.31
-------------------------

USB description data (for identification)
-------------------------
Manufacturer:
     Product: Mobile Connect
  Serial No.: not provided
-------------------------
Setting up communication with interface 0
Using endpoint 0x01 for message sending ...
Trying to send message 1 to endpoint 0x01 ...
USB error: error reaping URB: No such device
 Device seems to have vanished right after sending. Good.
 Device is gone, skipping any further commands
-> Run lsusb to note any changes. Bye.


[root@stlinux]#dmesg | tail -n40
<6>usbcore: registered new interface driver sierra
<6>sierra: v.1.3.8:USB Driver for Sierra Wireless USB modems
<4>IRQ 156/BLITTER: IRQF_DISABLED is not guaranteed on shared IRQs
<6>input: ywvinput as /devices/virtual/input/input0
<6>input: droidinput as /devices/virtual/input/input1
<4>IRQ 156/STGFB_Blitter: IRQF_DISABLED is not guaranteed on shared IRQs
<4>*********get viewport handle: 0xc17b4e4c, 0xc17b4e4c
<4>save exit: isCheckpointed 1
<4>save exit: isCheckpointed 1
<4>*********get viewport handle: 0x0, 0x0
<4>*********get viewport handle: 0xc17b4e4c, 0xc17b4e4c
<4>save exit: isCheckpointed 1
<4>save exit: isCheckpointed 1
<4>smart_ioctl------------------------->set handle
<4>save exit: isCheckpointed 1
<4>save exit: isCheckpointed 1
<4>save exit: isCheckpointed 1
<4>save exit: isCheckpointed 1
<4>save exit: isCheckpointed 1
<4>save exit: isCheckpointed 1
<4>save exit: isCheckpointed 1
<4>save exit: isCheckpointed 1
<4>save exit: isCheckpointed 1
<4>save exit: isCheckpointed 1
<4>save exit: isCheckpointed 1
<4>save exit: isCheckpointed 1
<6>usb 1-1: new high speed USB device using stm-ehci and address 2
<6>usb 1-1: configuration #1 chosen from 1 choice
<4>[usb_probe_interface]drive name=usb-storage
<6>scsi0 : SCSI emulation for USB Mass Storage devices
<7>usb-storage: device found at 2
<7>usb-storage: waiting for device to settle before scanning
<5>scsi 0:0:0:0: CD-ROM                     Mass Storage     2.31 PQ: 0 ANSI: 2
<7>usb-storage: device scan complete
<4>usb 1-1: usbfs: process 1344 (usb_modeswitch) did not claim interface 0 before use
<6>usb 1-1: USB disconnect, address 2
<6>usb 1-1: new high speed USB device using stm-ehci and address 3
<6>usb 1-1: configuration #1 chosen from 1 choice
<4>[usb_probe_interface]drive name=usbserial_generic
<4>[usb_probe_interface]drive name=usbserial_generic
[root@stlinux]#

[root@stlinux]#cat /proc/tty/driver/usbserial
usbserinfo:1.0 driver:2.0
[root@stlinux]#



 PPPD is offline. Trying to start ...
Trying to switch: Huawei switch to Modem mode
Trying find port after switching to modem mode:...[ OK ]
Trying find port:...[ OK ]
Starting pppd:
Failed to open /dev/ttyUSB0: No such device
Failed to open /dev/ttyUSB0: No such device
[FAILED]

[root@stlinux]#