Jio voice calls are free for lifetime said by them but they didn’t know what quality they are giving to the consumer .The consumer had to call a no then he should have too be clam because if will never connect at all in first attempt . I had very bad experience of jio voice calling.voice quality is as internet calling u have to wait for response from front for 3-4 secs of delay .if internet is close we will go offline so always internet should be ON .what happens when u go to small town for any work jio service is not available so no calls or message will come and u will be disconnected from your friend, famliy etc.