I have been using jio sim from about a year. I think its the worst network of the country. The internet speed is sometimes more slower than a snail. Many of the times while calling anyone its shows network busy which is very irritating. Many a times we call on any number and , due to networking problem the call is transferred to someone elsenumber across the country.i recommened to buy other sims rather than using a jio one( all plans of the sim being almost same.)