Quite honestly, they have the India firmware files in the FW repository...

But yes, the Indian Governments put in restrictions on VOIP, and even actively blockout many betamax voip providers, since this is considered a security issue.

I live in the UK, but when I do go back, i just VPN into my server in the UK, or a paid server (only £3 a month) and login to my VOIP services.

But then again, their regulations keep changing, allowing certain voip providers to get a license. So, most of the voip services there are on and off.