The Blackberry Curve by Research in Motion is widely recognized as one of the best smartphones available today. With its push e-mail capabilities and great personal information management software, the Curve competes directly against the Samsung Blackjack and similar smartphones. Before we proceed, let's have a look at some of the most notable features.

What you may or may not know is that there is more than one version of the Blackberry Curve. They all take on a similar appearance and many of the features are the same, but there are a few significant differences to note. In terms of what they have in common, they all have quad-band GSM cellular reception, custom wallpaper, memory card expansion, stereo Bluetooth, and a two megapixel camera. Some of the differences are that the BlackBerry Curve 8310 has GPS, whereas the Curve 8320 has WiFi. The 8300 seems to have neither.

In order to truly appreciate the Curve, you'll need to subscribe to both the BlackBerry Internet Service (BIS) and the BlackBerry Enterprise Server (BES). These are the services that power things like push e-mail, a must for any mobile professional.