Ive had both Idea and Airtel numbers, and I would say Airtel is the superior one here. Why? Well, Ive been using Airtel for 2 years now, and as a freelancer, clear and reliable communication is key for me. I havent experienced any major call drops or signal losses, the connectivity is good, and the 4G is fast enough to allow me long duration video calls with clients. Apart from this, I had an issue where my recharge wasnt going through. I contacted Airtels customer care, and they got it sorted within the day.
So, in my opinion, go for Airtel.
Thank You ??