In Windows XP goto run and type regedit,for Windows 7 goto start and type regedit .
In regedit Click on HKEY_LOCAL_MACHINE
In this section click on SOFTWARE and find the Linktop3G.
Than click on it(Linktop3G).
You will able to see Engineer so right click on it and modify the value from 1 to 0.
That's all. Now your Bsnl 3G capable with any network sim card.
NOTE : You have to set up new internet setting according to your service provider and make that setting as a default setting.
In regedit Click on HKEY_LOCAL_MACHINE
In this section click on SOFTWARE and find the Linktop3G.
Than click on it(Linktop3G).
You will able to see Engineer so right click on it and modify the value from 1 to 0.
That's all. Now your Bsnl 3G capable with any network sim card.
NOTE : You have to set up new internet setting according to your service provider and make that setting as a default setting.