I am using jio sim from last 8 months, in the begining the jio service was good but from last 2 months only single sign of network is geeting on mobile. All the time I have to raise my hand to use internet, I call to customer care service of jio, they always lodge a complaint regarding network issue but no solution still getting from jio service provider. Its too difficult to call from jio, this never connect on call, if my call connect then voice cracked everytime and there is lag in the voice recieved by other person. I will reccomend to use other network provider services, these can be expensive but you will be able to take calls and recieved.