I am using AIRTEL since 2 years. In this period I have no problem with it. It is very strong network operator, which has strong signal everywhere. I am doing Recharge of Rs.55 for outgoing calls in which I will get 10K LOCAL AND STD FREE SECONDS. Recently they had changed plan and reduced free sec. Before 2 months I was getting 13K Local and STD FREE sec. I am also using its 2G internet in Rs.98 for 1GB to validity of 21 days. It has good internet speed as compare to others. Browsing as well as downloading speed is fast.
My family members are also using AIRTEL. It has AIRTEL APP also through which we can recharge and do shopping also. We have to credit money in Airtel as AIRTEL MONEY further we can use it for recharge and shopping site for shopping as payment option. All services are good so need not worry USE IT. Best service network operator.