Jio is best as it was free and no one actually judges the free things.
Advatnages - It was very cheap as u have to pay only 399 for 3 months of use both net and calling compared to other uses who used to charge 250 for 1 month before jio emerged.
Disadvantages- u cants talk for a long after a time oeriod of 10 mints the call gets drop and you have to call that person again.But thats not a big deal.The voice quality is a bit shaky.The network is too good at some places while at some its of no use.
