WhatsApp Opt Out for Data Sharing with Facebook

If you’ve already accepted the new T&Cs without unchecking the box to share your information with Facebook WhatsApp is also offering a thirty-day window to make the same choice — via the settings page in the app.

To exercise your opt out in this scenario you need to go to Settings > Account > Share my account info in the app and uncheck the box/toggle the control displayed there. And do so within the thirty-day window. Presumably, after that, even this partial opt out will expire.