The Curve (model 8310) is a combination of RIM's super-slim, super-successful BlackBerry Pearl (two letter per keyboard key) and the full-sized, QWERTY keyed 8800 series — taking a bit from each to create a completely new “curvy” form factor. The upgrade to the 8300, the 8310 comes with a GPS receiver with Blackberry maps.
Curve is only 4.2 by 2.4 by 0.6 inches and weighs just 3.9 ounces. That means it’s only slightly larger than their Pearl, but sports the full keyboard and a larger screen (320 by 240 pixels). The light-sensing technology for the screen automatically adjusts backlighting levels for indoor, outdoor and dark environments.
Curve is a GSM/GPRS/EDGE phone which works in most places on the planet. There’s Bluetooth in there too. And, of course, Curve runs BlackBerry’s famous e-mail delivery software.