Viewing a single comment thread. View all comments

CuppaTeaThreesome t1_iujboom wrote

They have all your information because other people uploaded their contacts, calendars and everything else.


probably_abbot t1_iujuk16 wrote

Exactly. Any app that pops up and wants access to your contacts is possibly gathering this information. They'll 'help find your friends' on Facebook by matching up phone numbers and contact info they've already collected and have in their DB.