I am using jio from past 6 months and what I have experienced is that jio networks are not good at all, as it is mew to this worls so maybe its towers are not everywhere not covering all cities but this is the biggest drawback, I myself in my home cant talk on phone I have to ho out of my house to talk on phone and as per internet speed it is good and plans are also nice , ita like 399 for 3 months in which you get 1 gb data per day unlimited calls and 400sms per day which is quite impressive and cheap compared to others.