I'm not saying the lower end devices were unsuccessful, I was just stating forgetting about higher end devices would be a mistake.
Also the 8900 Curve should be considered a lower end device considering it's lack or 3G especially since it was released after the 9000 if I remember correctly.
8830 -> 8330 -> 9550 -> 9650
Just think about how far BlackBerries have come from then till now... And what else is coming.
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