Thanks for the detailed information. However, this seems to refer to a match between your own whatsapp number and your own facebook account. What I find even mo

Thanks for the detailed information. However, this seems to refer to a match between your own whatsapp number and your own facebook account. What I find even more interesting is that the entire address book can be matched, also if most of your address book contact don't have a whatsapp account but a facebook account!