Really?
In Colombia Blackberries are going the way of the dodo. Cheap androids, iphones, and windows mobiles are the norm.
The only people you really see with blackberries are people who have bought them off of Mercado Libre.
A big clue in all of latin america is that I would say 80 percent of the people who have a blackberry have it for show and do not have a data plan, and just use them for plain text.
I would also say this goes for Peru, Ecuador, Chile, and Argentina. Even when I was working between those countries in 2010-2011 blackberries were dropping in share.
You also have to realize that people in Latin America will keep an iphone or an android in one pocket, and a blackberry or cheap phone in the other. They only haul out the expensive one when they are relatively safe.