I am using the jio Sim jio sim network coverage is very well but Internet speed is very slow so I did not like jio Internet speed but this is come with free Internet 3 months and calling unlimited lifetime so this is advantage of jio sim this Sim is free the sim only support 4G devices.
Jio customer service is very well but small cities not many services there are only 1 jio Store and villages service is not very good.
Charges and billing jio sim nothing charges of 31st March 2017 of unlimited Internet unlimited calls unlimited message and 1st April billing only Internet calling is lifetime free this is very good jio Sim.