Fring Voip

I installed a software Nimbuzz and Fring in my NOKIA63 Mobile. but I do not know what kind of mobile internet connection I have to take my laptop to use the free call service by Nimbuzz and Fring India. what are the best and cheepest mobile internet in India, we can use the VoIP service?

If you want to know what VoIP provider Nimbuzz and fring, can I use the communications xeloq
He is good and fresh per second and euros and cheap and I am a dealer for them for 2 years