Plug in your data card/modem in the concerned port and install all necessary drivers and other software.
To unlock ZTE follow the simple steps below:
1- Make sure that the default network’s SIM is working in it
2- Unplug your device from the computer, remove the default network’s SIM and put
in the concerned network’s SIM which you are going to use with data card
4- Plug in your device again. If the default program launches itself, exit it
5- Now run dccrap.exe which you have downloaded and unzipped
6- Select ZTE data cards from the “Select manufacturer” menu