Hi guys, I got a question: Say I have whatsapp on my iphone and have a contact called contact 'X' in my phonebook. Contact 'X also has whatsapp but doesn't have my phone number in his phonebook. Once I install whatsapp on my phone, contact 'X will show up on my list of favourites on whatsapp. Once he is added on my phone, am I added on his phone automatically? Basically, my question is, if two people have whatsapp but only one person has the other persons number, what will happen?