From east to west and south to north best mobile operator is Airtel. Is it true or not. I use Airtel from last five years and my experience is very good by using Airtel. Yes call rate is pretty mush high than other network but network is awesome then others mobile operator.
There is less issue to claim a complain. Call drop rate is very few then the main competitive mobile operator Vodafone. Promo option is large then the others. Most important it’s network is very mush strong. You can get signal your mobile all most pan India thought it has a strong coverage.
As a Indian company Airtel make a strong mark all over the world.