Much like your favorite PC or PC accessory manufacturer there is a science behind BlackBerry smartphone model numbers.

As of now, here's what it all means:

First 2 digits

81xx - Suretype, Non Flip, Camera
82xx - Suretype, Flip, Camera
83xx - QWERTY, Non Flip, Camera
85xx - QWERTY, Non Flip, Camera, Expanded Internal Memory
88xx - QWERTY, Non Flip, No Camera, GPS, GSM
89xx - QWERTY, Non Flip, Camera, High Res Screen, Expanded Internal...