Reliance jio is best, I mean to say I am a regular customer of reliance I was able to get 3g speeds pf nearly 800-900kbps on reliance 3g .
But now we are getting 40mbps downloading speed from reliance. I mean this is something worth buying, the only thing you expect from a 4g service provider is customer support and internet speed nowadays and coverage also and reliance got it all.