I am using Idea for many years now. Recently 2-3 times I found that when I reach home, there is no signal at all!
I actually had very good signal for Idea and internet speed on 3G was also very good (before 4G arrived), and for that reason I had ported my Vodafone to Idea 2-3 years back.
After merger instead of getting better, Network is going worse it seems.