I have been using Jio from Dec 2016 and find it so good. I have 4 month used free service from it. call is free for lifetime. all you have to pay for data use only. you have to pay only for the data. in future you have to recharge with 99 to b eligible for prime membership. after that if you recharge with 303 rupies before 15 april 2017 you will get 1gb data every day for 4 month. and you also get unlimited call.customer service of joi is also good I have try 2 time and than I was satisfied by their service. Bye the way I am using jio unlimited service till now. so friends its really good.you can go for it.