that's how many users they have. >> my gosh. let's talk privacy concerns. this always comes out. a lot of people freaked out when facebook started featuring ads that target users. now whatsapp, do you need to worry about facebook having your phone number? >> well facebook may already have your phone number if you put it into your profile or if you signed in your cell device they often ask your phone number as a way of double-checking your privacy if you need your password or get into your account. whatsapp been very good with user relations. and they've been very good as they've grown. and we'll have so ehow those things change when they go under the fold or under the umbrella of facebook. and if they'll fall, rather, under the rules of facebook's privacy policy. >> yeah, the change is to come. and christi brought up one that i'm interested in. you mentioned apps in facebook.