Today , Reliance jio is india largest network . Reliance jio has the best coverage across the india . I am using jio sim from September and I think they improve their network day by day. There was some issue of calling but they are also fixing the bug .Jio has been free from last 9 moths. Recently reliance jio realesed the prime membership of only 99 rupee of registration fee and minimus of 303 rupee per month. Jio is improving their customer service day by day to make the jio in no.1 position among the other networks.