Telecom tariff hike is needed as the current rates are "unsustainable" and market conditions will be seen before a call is taken, telecom czar and chairman of Bharti Airtel Sunil Mittal has said.

Bharti Airtel chairman Sunil Mittal says telecom tariff hike needed as pricing is 'unsustainable'

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Bharti Airtel chairman Sunil Mittal says telecom tariff hike needed as pricing is 'unsustainable'