That is why I don't have much hope on ChoRCom. ChoRCom 2G's voice call quality is very very horrible, that even the pathetic BSNL's 2G voice calls are much better. Reg coverage, ChoRCom's 2G GSM was a very very BAD joke.
I agree that Jio is NOT a threat to ChoRCom's 2G voice business. They are already giving dirt cheap 2G voice calls for years. But NOW they are NOT alone. Even BSNL, Airtel, Vodafone and Idea have started giving better voice plans (NOT DATA) to their 2G / 3G users. They have better coverage and great voice call clarity as well.
Among Telcos, Whoever may be the loser, at last customers are going to be the winners.