How you can opt-out from sharing your WhatsApp information with Facebook
Whatsapp is now informing its users about the updated privacy policies gradually through the app. A Notification about updated policy will receive on user’s screen for their approval. Before you click on ‘Agree’ button, just scroll down and tap on the ‘Read More’ option. This will show you the entire policy content, but at the bottom of this policy, you will see a tiny message together with a confirmation check box, “Share my WhatsApp account information….” Uncheck it and then click on Agree button.
Even if you opt-out for sharing your information with Facebook, WhatsApp will still obtain and utilize this information to develop its infrastructure, delivery systems, fighting spam, abuse or violation activities.