There are illegal apps to watch them free of any sim or cost but we can not mention them here.
However there is AirtelTV if you have a Airtel sim, JioTV if you have a Jio sim, TataSky if you have a TataSky DTH box with Zee Bangla HD subscribed, Vodafone Play if you have Vodafone. Im not sure if IdeaTV has it. Zee5 has Zee Bangla HD live but it costs 999/- yearly.
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