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Continue to ChatBharti Airtel chairman Sunil Mittal says telecom tariff hike needed as pricing is 'unsustainable' - Business News - Firstpost https://www.indiafinancenews.com/bharti-airtel-chairman-sunil-mittal-says-telecom-tariff-hike-needed-as-pricing-is-unsustainable-business-news-firstpost/