The Curve 8300 was introduced on May 3, 2007 and released a week later on May 10 2007. The Curve had high end multimedia features, such as a high resolution camera, a music player, an FM Radio, and a GPS, nowdays, this phone is described as an early model of the ever popular Bold except with BlackBerry OS 4.2 built in rather than BlackBerry OS 5 which the Bold features.
The BlackBerry Curve 8900 is the succeesor to the BlackBerry Curve 8300. The 8900 has a 3.2 megapixel camera and video camerra with the operating system BlackBerry OS 5 built in with Wi-Fi. The Curve 8900 is known as the Javelin in Asia while the keyboard is called the "Chicklet".
The Curve 9300 was released in August 2010 with the operating system BlackBerry OS 6 inside the phone. Other features include easier navigation, a faster web browser, (now supporting 3G and a new data plan) and an improved camera. This phone also has a new "Zen" design.
The Curve 9380 is the first Curve to feature no physical keyboard with a touchscreen, but still however, features the trackpad. The phone runs on BlackBerry 7. The phone is more comftable than previous models, but it feels like the phone itself is unstable.