I had a very good experiance with jio service.i am using jio from last 8 months.its speeds is very good 500-700 kb/s.i am downloading very fastly any type of music and movie.rural area also get eduction from jio internet.voice calling quality is very nice.but their are some issue with jio sim internet is not working at some places.calls end automatically.jio provide unlimited data and calls for 3 months at only 309.jio has also very good features like jio tv, jio money, jio music etc.i suggest you to use jio sim.