UNBLOCK BSNL 3G USB Modem and Use With Every sim

Just FOLLOW These STEPS:

1. plug ur modem to pc... now ur software will be opened automatically.
2. goto network select manual.
3. now select ur desired network and create a connection for ur network.
4. set it as default connection and exit.

5. now put the other sim for which u created connection.
6. plugin modem again and it will say invalid sim..dont worry ..just dont press ok, rather drag it to a corner.
7. now goto network connections under u can see the 3G Modem connection there.

just double click it and put dial up number *99#
and press dial...now u will be connected successfully...