Though the company has decided to provide 300 minutes of free calling to its feature phone users every month free of cost, the users will not be able to use all 300 minutes of free calling facility in one go...

https://www.financialexpress.com/industry/technology/reliance-jio-to-offer-300-minutes-of-free-calling-buy-one-get-one-recharge-plan-to-these-users/2251937/

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