It was, because it was what people could pay.
Symbian phones were much cheaper than a iPhone, and Android had not yet really arrived in force.
Nokia was known here for making sturdy, durable phones that you could use for a long time. If they paired that with also having a solid app ecosystem for the most popular brazillian uses (like, Facebook, Mail and Youtube) they could have easily won the smartphone wars here.
Instead they dumped Symbian and went for Windows Phone, allowing Android to get their former place in the market.
Mind you, most Android phones here are now no-name chinese ones, Nokia left the cheap but solid phone market, and cheap (but not-solid) phones took over the vacuum.