WhatsApp’s recent privacy policy update announced plans to share data with WhatsApp’s parent company Facebook, signalling a concerning shift in WhatsApp’s attitude toward user privacy. In particular, the open-ended, vague language in the updated privacy policy raises questions about exactly what WhatsApp user information is or is not shared with Facebook. WhatsApp has publicly announced plans to share users’ phone numbers and usage data with Facebook for the purpose of serving users more relevant friend recommendations and ads. While existing WhatsApp users are given 30 days to opt out of this change in their Facebook user experience, they cannot opt out of the data sharing itself. This gives Facebook an alarmingly enhanced view of users’ online communications activities, affiliations, and habits.