Taking a page out of the Chinese playbook on how to be a monopoly based economy, India's telecom regulators have cracked down on VoIP being used in the country illegally actually going as far as arresting some of the operators. One of the companies is Primus Telecommunications India, which may be a sister company of Primus, the company that offers Lingo here in the USA.
I know as fact that some USA based companies which do offshore IT development in India have used Vonage boxes in India with USA phone numbers, as well as Skype. IP knows no boundry lines and borders get crossed. I find this humourous that the country that welcomes so much outsourced business on one hand wants to restrict the ability to efficiently communicate on the other.