A landmark legal battle over privacy, data control and the business model of big tech is playing out in India as WhatsApp's 2021 privacy policy faces close scrutiny from the country's top court.

At stake is not just WhatsApp's policy, but broader questions over privacy rights, consumer choice and regulation of dominant online platforms. WhatsApp is India's most popular messaging app.

A few days ago, WhatsApp told the Supreme Court it would comply by 16 March with an order requiring it to give Indian users greater control over how their data is shared with its parent company, Meta.

In an affidavit, seen by the BBC, the messaging platform added that users could continue using the app even if they opted out of sharing data with Meta for advertising.

The move comes days after the court criticised WhatsApp's 2021 privacy policy, warning that it would not allow WhatsApp or Meta to "play with" Indians' right to privacy or "make a mockery" of the Constitution, which guarantees privacy as a fundamental right.