Airtel — airtel call dropping too often

I went to relatives last week in hyderabad. There was no signal at all in the home. We could make a call from outside of the house yet frequent call drop - often annoying. Even had to miss office calls there by effecting the productivity. Seems like airtel is missing on its strength (Connectivity) and focusing on hi-fi things like 4g, etc. Horrible connectivity in the cities makes me feel sad, the poor way of managing things.