The 2 Big Social networks are ready to share the customer database, if you don’t want to do this, here is what all you need to do. You have 30 days to stop this.
WhatsApp is offering a partial opt-out for Facebook targeted ads and product related purposes, which I will let you know later in this article, but completely opting out of the data-sharing does not seem to be possible.
When prompted to accept the updated T&Cs, tap Read to expand the full text.
A checkbox option at the bottom of the policy for sharing your data on Facebook will appear.
Untick this option before hitting Agree. This will let you opt out of the data-sharing.
The second option is for those who have already accepted the new T&Cs without unchecking the box to share their information with Facebook.
WhatsApp is also offering a thirty-day window for users to make the same choice via the settings page in the app. To exercise your opt-out in this scenario you need to follow these steps:
Go to Settings → Account → Share my account info in the WhatsApp app
Uncheck the box displayed there within 30 days, as after that this partial opt-out window will expire.
However, WhatsApp states Facebook will still receive your data in some situations.