I was about to join Whatsapp but heard rumors that FB is about to buy it, back then. I am still on FB and never gave FB my number, and never joined Whatsapp. Th

I was about to join Whatsapp but heard rumors that FB is about to buy it, back then. I am still on FB and never gave FB my number, and never joined Whatsapp. Though FB has my number (hidden from me on), as many of my friends uploaded or sync their address book (FB app and Whatsapp). [FB is just an example]