I am using landline phone connection of mtnl since many years. My monthly bill comes up around 800 rupees. The rental is 500 rupees which I have to pay every month. I don’t see any sense in paying this. I have heard that people are using voip service these days. It saves money so even I would like to go for this one. Is it possible to switch to a VOIP and keep the same number? Any suggestions would be appreciated.