I want to say, Airtel provides best service in delhi-ncr, if someone here from out of delhi then I don’t think airtel gives best services, but in my opinion airtel is best in after sale service.
I bought a broadband+landline connection with tv plans and I am happy with that. buy my concern with airtel, it is that "they don’t give free data" actually I consume to 60 to 100 gb data per day.
Thanks mate