I hv using jio since last one month and it was great ekxperience to me it is really gives the speed of 4g but not every place the speed of jio also flactuate sometimes it gives the speed in mega bites and some time very slow the main problem is calling to other sim we cant contact other sim easily so they should work on it but it provide free data so it is good now the number of jio users increasing rapidly it reaches over 5 crore so jio net provider extended the validity of jio now we can use jio extra three month and also decrases the data 4gb to 1gb but jio is only the service provider who can provide us 4g lte network so its very good isuggest you to use jio if you are in range of good jio network