1.) Insert Sim in Modem .
2.) No need of ur Modem Software, it will say its invalid sim, close it
3). Start NOKIA PC suite.
4). Go to Nokia pc suite connect to internet option.
5.) Go to Configure. Select your data card modem,and make all operator apn setting as like when we use Nokia mobile connection ex: If ur sim is of Docomo then enter Apn as> tata.docomo.internet
6. U r Done click on finish.
7. Now connect to internet through PC suite.
8) you have succesfully accesses internet thu ur usb modem without Unlocking it