I am using the jio sim from last six month.the jio network connection is very poor .in anywhere it have not connection.many time I outgoing calling is not going due to bad network.sometime called is disconnected for poor network connection.the internet speed is very low the 4g speed like as 2g speed.customer service is very low category lot of times I claim the customer care for network but they did not a give responce my claim.really was disappointed in their behave.the charges and billing is very good.all customer it using for billing and charges in their network.