I have a couple questions about use of the app.

1) I have a BB Q10. I've been thru the instructions on how to add accounts, by first adding in the phone contact list. I'm doing something wrong as I still can't pull up someone I know is using WhatsApp in that account. Any tricks?

2) Can I use WhatsApp without having it roaming on a cellular network? Will it use hotspots? I'm going to Beirut and need to meet someone at the airport who uses WhatsApp. Lebanon is not one of the countries where T-Mobile offers free service.