I buy the reliance jio sim. am very happy withn that.I am getting coverage in all location where vodafone and Airtel didn’t show the signal. Also, I traveled from South to West by Train. I didn’t loose signal coverage. Speed of the network is also good. I always get above 10 MB Speed. Most of the day, I got 15 to 35 Mb. As for me, Jio is good as compare to others.Very good internet speed.i am enjoying this.