How can you say it "always" works ?? Every company works differently in different regions...I personally took Jio sim when it was being given free along-with data but I used to get like 1-2 Mbps all the time with worst call connectivity where either me or the person calling me couldn't listen anything properly because of the line disturbance...I also took the prime membership but after like 3-4 recharges & calling the customer care & also Nodal office at-least 20 times & listening to their fake promises, I finally stopped recharging my Jio number last year...