I've been reading about how Nokia killed off Symbian to support Microsoft and Windows Phone. I'm guessing that was a smart move, because Symbian isn't quite a household name like Android, iPhone, and Windows. (I first learned about it during Nokia's Windows Phone announcement)
It's ironic, because Symbian has supposedly been around longer than all of those platforms, yet barely anyone talks about it. If Symbian was so popular, then why didn't it get more publicity from developers and journalists? Even Blackberry is more well known, and that platform is more or less irrelevant now.