Step by step instruction-
Insert SIM in Modem.
Modem show invalid SIM, just ignore it and close modem software.
Start NOKIA PC suite. (Please do not use the latest Nokia Suite , Download it by Clicking on this link then click on skip advert http://www.shorthit.com/ZJp8)
Goto nokia pc suite connect to internet option.
Goto Configure. Select your data card modem,and make all operator apn setting as like when we use nokia mobile connection.
Finish set up.
Now connect to internet through PC suite.
Wow your net is connected without unlocking the modem.
You can use it by other method also just put sim card in the modem and connect it to PC. Modem software says invalid sim ,just go to connections and connect your sim will be recognized there...connect it. Worked for us in win7 but it did not worked in XP.
With Regards Harsh