Mittal said a monthly average of ₹350 would still leave India with "by far the cheapest" mobile tariffs anywhere in the world. Bharti Airtel's Sunil Mittal advocates for mobile tariff hikes to Rs 350/month, citing rising costs and crucial infrastructure investment needs for India's digital future. New Delhi, Nov 12 (PTI) Bharti Airtel founder and chairman Sunil Bharti Mittal on Thursday said Indian mobile tariffs should rise to about Rs 350 a.