Yes I am using airtel mobile sim card it is very useful to use and I love this for long long time before.
When I used to started this sim card I face some network problem for recharging and regarding balance es-sew but now a days this problem was gone. Now airtel lunched 4G, I tell you that I am using this featured and it worked perfectly at my area. my download speed is 1mbbs at idm.
Airtel broadband is also higher than any other broadband work great. I commended to every one to change your sim and come a Brod service network could airtel