How to unlock ZTE MF 190 modem

You have to use some software to unlock ZTE MF190 dongle.
Download software to unlock ZTE dongle click here
i. First of all, if you use some memory card, remove it. remove sim card and put SIM card what you want to unlock.(it will display invalid sim)
ii.Plug your modem in to your computer,sometime connection manager will display,close it.
iii. Unzip what you download and open dccrap.exe 

iv. First select the manufacture as ZTE datacards ( No: 1)
v. Select the model as Auto detect (recommended) (No : 2 ) If you know the model and
which com port you use.u can do that way also
vi. Click find button (No: 3) . after your modem model will display below box
vii. After detect modem click unlock button (No: 4 )