I am using airtel postpaid number from last 3 years with Rs. 299 bill plan in which I am getting 400 STD+Local Minutes, 400 Local+STD SMS & 1 GB 3G data after that unlimited 2G.
I am a big fan of airtel for its services like I do not have any need to pay my bill offline through some office, I can pay it through airtel money app easily. They never deduct additional charges like other telecom operator do intentionally.