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I am unable to install my USB Modem on Ubuntu 14.04, When I do:
sudo ./install.sh, I get the following error:

This software will not run until you install "QT3 Runtime Library". You can refer to Operaing System installation CD or Homepage to find out the QT3 Runtime Library installation package. This installation process will not continue until you install QT3 Runtime Library first.

I then installed USB_ModeSwitch following these instructions here http://www.draisberghof.de/usb_modeswitch/

USB_ModeSwitch was successfully installed and then when I try to install the USB Modem again, I get the same error.

I don't know what to do next. Here the result of lsusb command:

Bus 001 Device 010: ID 19d2:0117 ZTE WCDMA Technologies MSM 

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 003 Device 004: ID 1c4f:0002 SiGma Micro Keyboard TRACER Gamma Ivory

Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

I think that my USB Modem is being detected as a USB CD-ROM.
Here is the result of dmesg | tail command:

[ 3934.165521] scsi9 : usb-storage 1-4:1.3

[ 3935.165332] scsi 9:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2

[ 3935.165937] scsi 9:0:0:1: Direct-Access     ZTE      MMC Storage      2.31 PQ: 0 ANSI: 2

[ 3935.175561] sr1: scsi-1 drive

[ 3935.176136] sr 9:0:0:0: Attached scsi CD-ROM sr1

[ 3935.176805] sr 9:0:0:0: Attached scsi generic sg3 type 5

[ 3935.177554] sd 9:0:0:1: Attached scsi generic sg4 type 0

[ 3935.185897] sd 9:0:0:1: [sdc] Attached SCSI removable disk

[ 3935.448189] ISO 9660 Extensions: Microsoft Joliet Level 1

[ 3935.449931] ISOFS: changing to secondary root

If you read the install.sh script, you'll notice:

function check_qt3

{

  QT3LIB=$(find /usr/lib -name "libqt-mt.so*")

  echo $QT3LIB

  if [ "$QT3LIB" ];then

      echo "check QT3 Runtime Library successfully."

  else

       mymessagebox "Sorry This software will not run until you install "QT3 Runtime Library". You can refer to Operaing System installation CD or Homepage to find out the QT3 Runtime Library installation package. This installation process will not continue until you install QT3 Runtime Library first."

  exit -1

fi

}

The script checks the /usr/lib/libqt-mt.so*. If the file is not found, the message will prompt you to install Qt3. After this, installation can continue.

To install Qt3:
How to install qt3-dev-tools package

If you want to just work with your modem then you can try the UBUNTU's builtin feature.

1. go to setting.


2. search for connections in network setting.


3. add a new connection as mobile broadband.


4. select your device, country and Provider
   


5. save and I hope it will work without installing the modem driver