Shares of Idea Cellular and Bharti Airtel plunged up to 9% on Thursday after RIL Chairman Mukesh Ambani announced free voice calling and cheaper data tariffs for Jio customers.
Idea Cellular tanked 9% to Rs 85 -- its 52-week low on BSE.
Ambani also announced a 'free welcome offer' for Jio customers from September 5 till December 31. R Jio will offer users data services free for four months, after which it will offer 10 tariff plans starting at Rs 19 a day for occasional users, Rs 149 a month for low data users and Rs 4,999 a month for heavy data users.
At the RIL's 42th Annual General Meeting, the billionaire industrialist said Jio is targeting 100 million users in a shortest possible time.
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 "Idea, Airtel tank up to 9% on Rel Jio's lower tariff offers")
