1. Install BSNL 3G software initially comes with the device to support the modem by installing the drivers.
2. Then check if you have still BSNL 3G sim working whether is connecting or not.
3. Once it is working as expected , go to the install location of BSNL 3G device software Ex : C:\Program Files\BSNL 3G Data Card\BSNL 3G and rename the BSNL 3G.exe to some thing else.
To prevent it running from the start of device.
4. Now create one new dial up connection by selecting the device HSPA DataCardPropritary USB MODEM
5. while creating dialup connection use dialing number *99# ; user name and password will be blank. (depending on the signal provider dialing number might change; but for Vodafone *99# is working)
6. Now disconnect the device and remove BSNL sim and keep the other sim card ex : Vodafone.
7. Just wait for 30 sec till the 3G usb LED glows to Green. Unless it glows green you cant do any thing.
8. Now just click connect for the dialup you created already.
9. Now you are all set to use the BSNL device for other operators also.
10. enjoy your Internet now !
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