Its not possible to use any Sim in a modem without unlocking. For that you have to Pay.
But don't worry with the following trick you can do it for free :-)
Step by step instruction:
1. Insert SIM in Modem
2. Modem show invalid SIM, just ignore it and close modem software.
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.
Eg:- Apn for Airtel – airtelgprs.com
6. Finish set up.
7. Now connect to internet through PC suite.
8. Wow your net is connected without unlocking the modem.
Tags: Unlock Idea modem,Unlock Airtel modem,Unlock Tata Photon net Hauwei modem unlock,Unlock modem without software.