> When Facebook notified the acquisition of WhatsApp in 2014, it informed the Commission that it would be unable to establish reliable automated matching between Facebook users' accounts and WhatsApp users' accounts. It stated this both in the notification form and in a reply to a request of information from the Commission. However, in August 2016, WhatsApp announced updates to its terms of service and privacy policy, including the possibility of linking WhatsApp users' phone numbers with Facebook users' identities.
https://ec.europa.eu/commission/presscorner/detail/en/IP_17_...