[root@server ~]# dmesg |grep usb
....
usb 2-4: new high speed USB device number 2 using ehci_hcd
usb 2-4: New USB device found, idVendor=12d1, idProduct=1446
usb 2-4: New USB device strings: Mfr=3, Product=2, SerialNumber=0
usb 2-4: Product: HUAWEI Mobile
usb 2-4: Manufacturer: HUAWEI Technology
usb 2-4: configuration #1 chosen from 1 choice
usb-storage: device found at 2
usb-storage: waiting for device to settle before scanning
usb-storage: device found at 2
usb-storage: waiting for device to settle before scanning
usbcore: registered new interface driver usb-storage
usb-storage: device scan complete
usb-storage: device scan complete
...
[root@server ~]# lsusb
...
Bus 002 Device 002: ID 12d1:1446 Huawei Technologies Co., Ltd. E1552/E1800/E173 (HSPA modem)
[root@server ~]# usb_modeswitch -c /etc/usb_modeswitch.d/12d1\:1446 -v 0x12d1 -p 0x1446
Looking for target devices ...
No devices in target mode or class found
Looking for default devices ...
found matching product ID
adding device
Found device in default mode, class or configuration (1)
Accessing device 002 on bus 002 ...
Getting the current device configuration ...
OK, got current device configuration (1)
Using first interface: 0x00
Using endpoints 0x01 (out) and 0x81 (in)
Inquiring device details; driver will be detached ...
Looking for active driver ...
No driver found. Either detached before or never attached
SCSI inquiry data (for identification)
-------------------------
Vendor String: HUAWEI
Model String: Mass Storage
Revision String: 2.31
-------------------------
USB description data (for identification)
-------------------------
Manufacturer: HUAWEI Technology
Product: HUAWEI Mobile
Serial No.: not provided
-------------------------
Setting up communication with interface 0
Using endpoint 0x01 for message sending ...
Trying to send message 1 to endpoint 0x01 ...
OK, message successfully sent
Resetting response endpoint 0x81
Could not reset endpoint (probably harmless): -71
Resetting message endpoint 0x01
Could not reset endpoint (probably harmless): -19
Device is gone, skipping any further commands
-> Run lsusb to note any changes. Bye.
[root@server smsd]# ls /dev/ttyUSB*
/dev/ttyUSB0 /dev/ttyUSB1 /dev/ttyUSB2
