I am using reliance gio from the past 08 months. Over this period I enjoyed internet at free of cost. They mainly focused on only internet service not call service. The internet network runs very quickly in all the places i.e in the extreme locality but the call network is not good.
When you make calls some time it could not be connected and automatically makes disconnect. and for some time the total network went out for some hours as well. so this type of issue may be considered serious if they want to catch the market.