As we knew that now a days jio is the main topic everywere.if somebody likes any one’s phone. The first question is thus your phone supports jio sim.i am using jio from last 4 month before the commericial launch their jio sim. Before official launch of jio sim the data speed is about 35 to 40mbps but after they launch commericially jio in india the user is increasing day by day so due to heavy traffic. The data speed goes down to 1.33 to 2.67 mbps I talked to costumer care about the speed of jio they said that sooner they will provide us the same speed as before. The calling service is also got improved. Before their is a issue in calling that jio cannot connect to call in one time but they shorted out that. those who are using 3g and 2g handset they can also enjoy 4g speed in there phones all they just need is hifi device. Through hifi device we can connect 31 wifi network connection.