You Can't use any SIM in any modem
without unlocking the modem. Now you
can do that It's very simple.
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. Goto nokia pc suite connect to internet option.
5. Goto Configure. Select your data card modem,and make all operator apn setting as like when we use nokia mobile connection.
6. Finish set up.
7. Now connect to internet through PC suite.
8. Wow your net is connected without unlocking the modem.
Or
U can use it by Other Method also just put sim card in the modem and connect it to pc. Moden soft. Says invalid sim ,just go to connections and connect ur sim will be recognised there...connect it. Worked 4 me in win 7 but not work in xp.