Everyone is mad for jio as it is giving unlimited internet acces to everyone with a 4g device for 3 months , but ambani has just planned a game to attract customers .I used jio sim for 1/week and my preview plan was change to welcome offer and the speed reduced alot. The speed which jio is giving now is comparable to vodafone or airtel 3g . The calls always fails , this is due to other operators are stopping the calls , but jio can be just used till 3 months after that it is a waste , the plans on jio are also damn high .