This network cover a big market share and no dout it provide a cheap plans but the network quality doesnt good.
If you are the user of jio you can understañd the problems that jio do not connect with call realating to government department and when your net is off you does not receive any call during the period.
Some times it happens that call does not coonect when you are in the area where good network coverage.
Thats why it is not a best operator because after considering rural area, government department, call drpoing etc problem.