Today jio is trending alot because it gives you free service for three months as a preview offer. I also use it but in my opinion as a caller aspects jio sim fails all caller aspectation as a service provider if you read in news paper in just one week its calls drops reaches 52 crore or above and as in normal caller description I inly said you outoff ten calling attempts from jio sim card only one attempt is succesfull. This is jio free calling output but really net 4g is worth it it gives you super fast net.sometime 5mbps speed is measured it is very amazing.