How to Stop Whatsapp From Sharing Your Number With Facebook
However, if you still think this new update is dodgy, there is a way you can opt out from letting Whatsapp share your number with Facebook.
Open the Whatsapp app on your phone and head over to settings. In the settings menu, go into account settings and there, you will find a checkbox which says “Share my account info”. Simply untick that box and you are good to go. Keep in mind that once you untick it, the option will disappear and you can’t go back to allowing Whatsapp to share your number with Facebook.
Users will have a maximum of 30 days to opt out, so act quick!