How to get updated facebook app for boost, samsung sleek phone.?

[pri]

I just got the new Samsung Sleek with boost mobile and on the box they have a pic of this great Facebook app that shows all the pics and everything. But on the phone, there are hardly any pics on the app. It's like it's outdated of something. I tried to go to Facebook and download the newer app version 3.2. But it says that my phone is not compatible. Dose anyone know how to get the newest version of facebook app to the Samsung sleek by boost mobile. The one I have is 1.0. Plz help me