I have been using jio sim for the last 2 years. For me, It was like a revolution in telecom sector because that time most of the operators were charging very high amount for every GB data. But, speed of internet at here in Shimla is decreasing day by day. Sometime it is so frustrating that it does not even load simple site. Other problem with the jio sim is that If you are using two Sims in your phone and your data is off on the jio sim, you can neither call nor get incoming calls. So, I think as they are providing internet at a very affordable price but on the other hand there are number of problems with the jio sim.